What is the best way to travel from St. Louis, MO to Phoenix, AZ?
Looking for a trip? Compare all the available Flights and Buses for the journey to Phoenix, AZ from St. Louis, MO. Check between different modes of transportation, look for the cheapest tickets, fastest rides and most popular stations, and see all 1 available companies to find your perfect trip!
What is the cheapest way to reach Phoenix, AZ from St. Louis, MO?
You can get to Phoenix, AZ with just $79 by taking a Flight from Frontier Airlines, but you can find many more cheap offers: we have selected the best ones for next few days here for you.
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Frontier Airlines6h 2m03:21 PMSt. Louis Lambert AirportSt. Louis Lambert Airport7:23 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/20/2026 3:21:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/20/2026 7:23:00 PM. 50 Economy ticket for $80 per person are available. Travel duration is 6h 2m
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Frontier Airlines46h 2m08:23 PMSt. Louis Lambert AirportSt. Louis Lambert Airport4:25 PMPhoenix-Mesa Gateway AirportBus Stop0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/20/2026 8:23:00 PM to Bus Stop, Phoenix-Mesa Gateway Airport (USA) arriving at 4/22/2026 4:25:00 PM. 50 Economy ticket for $193 per person are available. Travel duration is 46h 2m
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United Airlines9h 13m07:45 AMSt. Louis Lambert AirportSt. Louis Lambert Airport2:58 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/20/2026 7:45:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/20/2026 2:58:00 PM. 50 Economy ticket for $221 per person are available. Travel duration is 9h 13m
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Allegiant Air52h 33m09:36 AMMidAmerica St. Louis AirportMidAmerica St. Louis Airport12:09 PMPhoenix-Mesa Gateway AirportBus Stop0EconomyA Flight from Allegiant Air goes from MidAmerica St. Louis Airport, MidAmerica St. Louis Airport (USA) at 4/20/2026 9:36:00 AM to Bus Stop, Phoenix-Mesa Gateway Airport (USA) arriving at 4/22/2026 12:09:00 PM. 50 Economy ticket for $225 per person are available. Travel duration is 52h 33m
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Frontier Airlines45h 10m04:59 PMSt. Louis Lambert AirportSt. Louis Lambert Airport12:09 PMPhoenix-Mesa Gateway AirportBus Stop0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/20/2026 4:59:00 PM to Bus Stop, Phoenix-Mesa Gateway Airport (USA) arriving at 4/22/2026 12:09:00 PM. 50 Economy ticket for $270 per person are available. Travel duration is 45h 10m
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Alaska Airlines12h 46m07:00 AMSt. Louis Lambert AirportSt. Louis Lambert Airport5:46 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/20/2026 7:00:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/20/2026 5:46:00 PM. 50 Economy ticket for $298 per person are available. Travel duration is 12h 46m
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Greyhound US30h 50m01:20 AMSt. Louis, MOGateway Station6:10 AMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 4/20/2026 1:20:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/21/2026 6:10:00 AM. 50 Economy ticket for $106 per person are available. Travel duration is 30h 50m
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Greyhound US30h 0m08:40 AMSt. Louis, MOGateway Station12:40 PMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 4/20/2026 8:40:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/21/2026 12:40:00 PM. 50 Economy ticket for $106 per person are available. Travel duration is 30h 0m
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Greyhound US29h 30m09:10 AMSt. Louis Lambert AirportSt. Louis Lambert Airport12:40 PMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/20/2026 9:10:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/21/2026 12:40:00 PM. 50 Economy ticket for $110 per person are available. Travel duration is 29h 30m
Cheapest Flights Monday
Cheapest Buses Monday
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Greyhound US30h 50m01:20 AMSt. Louis, MOGateway Station6:10 AMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 4/21/2026 1:20:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/22/2026 6:10:00 AM. 50 Economy ticket for $103 per person are available. Travel duration is 30h 50m
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Greyhound US30h 0m08:40 AMSt. Louis, MOGateway Station12:40 PMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 4/21/2026 8:40:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/22/2026 12:40:00 PM. 50 Economy ticket for $103 per person are available. Travel duration is 30h 0m
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Greyhound US29h 30m09:10 AMSt. Louis Lambert AirportSt. Louis Lambert Airport12:40 PMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/21/2026 9:10:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/22/2026 12:40:00 PM. 50 Economy ticket for $107 per person are available. Travel duration is 29h 30m
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Frontier Airlines8h 19m04:59 PMSt. Louis Lambert AirportSt. Louis Lambert Airport11:18 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/21/2026 4:59:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/21/2026 11:18:00 PM. 50 Economy ticket for $127 per person are available. Travel duration is 8h 19m
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Alaska Airlines10h 2m07:00 AMSt. Louis Lambert AirportSt. Louis Lambert Airport3:02 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/21/2026 7:00:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/21/2026 3:02:00 PM. 50 Economy ticket for $182 per person are available. Travel duration is 10h 2m
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Hawaiian Airlines10h 53m07:00 AMSt. Louis Lambert AirportSt. Louis Lambert Airport3:53 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Hawaiian Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/21/2026 7:00:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/21/2026 3:53:00 PM. 50 Economy ticket for $188 per person are available. Travel duration is 10h 53m
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Frontier Airlines21h 10m04:59 PMSt. Louis Lambert AirportSt. Louis Lambert Airport12:09 PMPhoenix-Mesa Gateway AirportBus Stop0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/21/2026 4:59:00 PM to Bus Stop, Phoenix-Mesa Gateway Airport (USA) arriving at 4/22/2026 12:09:00 PM. 50 Economy ticket for $225 per person are available. Travel duration is 21h 10m
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United Airlines7h 9m06:00 AMSt. Louis Lambert AirportSt. Louis Lambert Airport11:09 AMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/21/2026 6:00:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/21/2026 11:09:00 AM. 50 Economy ticket for $227 per person are available. Travel duration is 7h 9m
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American Airlines11h 19m05:20 AMSt. Louis Lambert AirportSt. Louis Lambert Airport2:39 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from American Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/21/2026 5:20:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/21/2026 2:39:00 PM. 50 Economy ticket for $269 per person are available. Travel duration is 11h 19m
Cheapest Buses Tuesday
Cheapest Flights Tuesday
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Frontier Airlines8h 4m04:59 PMSt. Louis Lambert AirportSt. Louis Lambert Airport11:03 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/22/2026 4:59:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/22/2026 11:03:00 PM. 50 Economy ticket for $80 per person are available. Travel duration is 8h 4m
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Alaska Airlines10h 0m07:00 AMSt. Louis Lambert AirportSt. Louis Lambert Airport3:00 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/22/2026 7:00:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/22/2026 3:00:00 PM. 50 Economy ticket for $208 per person are available. Travel duration is 10h 0m
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Alaska Airlines9h 13m04:46 PMSt. Louis Lambert AirportSt. Louis Lambert Airport11:59 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/22/2026 4:46:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/22/2026 11:59:00 PM. 50 Economy ticket for $208 per person are available. Travel duration is 9h 13m
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United Airlines6h 4m06:05 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:09 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/22/2026 6:05:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/22/2026 10:09:00 PM. 50 Economy ticket for $222 per person are available. Travel duration is 6h 4m
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Frontier Airlines49h 28m04:59 PMSt. Louis Lambert AirportSt. Louis Lambert Airport4:27 PMPhoenix-Mesa Gateway AirportBus Stop0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/22/2026 4:59:00 PM to Bus Stop, Phoenix-Mesa Gateway Airport (USA) arriving at 4/24/2026 4:27:00 PM. 50 Economy ticket for $308 per person are available. Travel duration is 49h 28m
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Frontier Airlines31h 5m04:59 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:04 PMPhoenix-Mesa Gateway AirportBus Stop0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/22/2026 4:59:00 PM to Bus Stop, Phoenix-Mesa Gateway Airport (USA) arriving at 4/23/2026 10:04:00 PM. 50 Economy ticket for $340 per person are available. Travel duration is 31h 5m
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Greyhound US30h 50m01:20 AMSt. Louis, MOGateway Station6:10 AMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 4/22/2026 1:20:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/23/2026 6:10:00 AM. 50 Economy ticket for $103 per person are available. Travel duration is 30h 50m
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Greyhound US30h 0m08:40 AMSt. Louis, MOGateway Station12:40 PMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 4/22/2026 8:40:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/23/2026 12:40:00 PM. 50 Economy ticket for $103 per person are available. Travel duration is 30h 0m
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Greyhound US29h 30m09:10 AMSt. Louis Lambert AirportSt. Louis Lambert Airport12:40 PMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/22/2026 9:10:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/23/2026 12:40:00 PM. 50 Economy ticket for $107 per person are available. Travel duration is 29h 30m
Cheapest Flights Wednesday
Cheapest Buses Wednesday
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Greyhound US30h 50m01:20 AMSt. Louis, MOGateway Station6:10 AMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 4/23/2026 1:20:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/24/2026 6:10:00 AM. 50 Economy ticket for $103 per person are available. Travel duration is 30h 50m
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Greyhound US30h 0m08:40 AMSt. Louis, MOGateway Station12:40 PMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 4/23/2026 8:40:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/24/2026 12:40:00 PM. 50 Economy ticket for $106 per person are available. Travel duration is 30h 0m
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Greyhound US39h 40m04:30 PMSt. Louis, MOGateway Station6:10 AMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 4/23/2026 4:30:00 PM to Bus Station, Phoenix, AZ (USA) arriving at 4/25/2026 6:10:00 AM. 50 Economy ticket for $148 per person are available. Travel duration is 39h 40m
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Frontier Airlines5h 36m08:06 PMSt. Louis Lambert AirportSt. Louis Lambert Airport11:42 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/23/2026 8:06:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/23/2026 11:42:00 PM. 50 Economy ticket for $105 per person are available. Travel duration is 5h 36m
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Frontier Airlines39h 3m08:06 PMSt. Louis Lambert AirportSt. Louis Lambert Airport9:09 AMPhoenix-Mesa Gateway AirportBus Stop0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/23/2026 8:06:00 PM to Bus Stop, Phoenix-Mesa Gateway Airport (USA) arriving at 4/25/2026 9:09:00 AM. 50 Economy ticket for $207 per person are available. Travel duration is 39h 3m
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Allegiant Air41h 33m05:36 PMMidAmerica St. Louis AirportMidAmerica St. Louis Airport9:09 AMPhoenix-Mesa Gateway AirportBus Stop0EconomyA Flight from Allegiant Air goes from MidAmerica St. Louis Airport, MidAmerica St. Louis Airport (USA) at 4/23/2026 5:36:00 PM to Bus Stop, Phoenix-Mesa Gateway Airport (USA) arriving at 4/25/2026 9:09:00 AM. 50 Economy ticket for $217 per person are available. Travel duration is 41h 33m
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Frontier Airlines36h 44m011:25 AMSt. Louis Lambert AirportSt. Louis Lambert Airport10:09 PMPhoenix-Mesa Gateway AirportBus Stop0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/23/2026 11:25:00 AM to Bus Stop, Phoenix-Mesa Gateway Airport (USA) arriving at 4/24/2026 10:09:00 PM. 50 Economy ticket for $221 per person are available. Travel duration is 36h 44m
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Allegiant Air10h 41m012:14 PMMidAmerica St. Louis AirportMidAmerica St. Louis Airport8:55 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Allegiant Air goes from MidAmerica St. Louis Airport, MidAmerica St. Louis Airport (USA) at 4/23/2026 12:14:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/23/2026 8:55:00 PM. 50 Economy ticket for $236 per person are available. Travel duration is 10h 41m
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Allegiant Air37h 26m010:43 AMMidAmerica St. Louis AirportMidAmerica St. Louis Airport10:09 PMPhoenix-Mesa Gateway AirportBus Stop0EconomyA Flight from Allegiant Air goes from MidAmerica St. Louis Airport, MidAmerica St. Louis Airport (USA) at 4/23/2026 10:43:00 AM to Bus Stop, Phoenix-Mesa Gateway Airport (USA) arriving at 4/24/2026 10:09:00 PM. 50 Economy ticket for $277 per person are available. Travel duration is 37h 26m
Cheapest Buses Thursday
Cheapest Flights Thursday
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Frontier Airlines8h 19m04:59 PMSt. Louis Lambert AirportSt. Louis Lambert Airport11:18 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/24/2026 4:59:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/24/2026 11:18:00 PM. 50 Economy ticket for $82 per person are available. Travel duration is 8h 19m
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Frontier Airlines20h 54m09:58 PMSt. Louis Lambert AirportSt. Louis Lambert Airport4:52 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/24/2026 9:58:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/25/2026 4:52:00 PM. 50 Economy ticket for $87 per person are available. Travel duration is 20h 54m
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Frontier Airlines45h 6m08:06 PMSt. Louis Lambert AirportSt. Louis Lambert Airport3:12 PMPhoenix-Mesa Gateway AirportBus Stop0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/24/2026 8:06:00 PM to Bus Stop, Phoenix-Mesa Gateway Airport (USA) arriving at 4/26/2026 3:12:00 PM. 50 Economy ticket for $218 per person are available. Travel duration is 45h 6m
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United Airlines6h 4m06:05 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:09 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/24/2026 6:05:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/24/2026 10:09:00 PM. 50 Economy ticket for $242 per person are available. Travel duration is 6h 4m
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United Airlines7h 26m07:45 AMSt. Louis Lambert AirportSt. Louis Lambert Airport1:11 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/24/2026 7:45:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/24/2026 1:11:00 PM. 50 Economy ticket for $247 per person are available. Travel duration is 7h 26m
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Frontier Airlines27h 21m04:59 PMSt. Louis Lambert AirportSt. Louis Lambert Airport6:20 PMPhoenix-Mesa Gateway AirportBus Stop0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/24/2026 4:59:00 PM to Bus Stop, Phoenix-Mesa Gateway Airport (USA) arriving at 4/25/2026 6:20:00 PM. 50 Economy ticket for $260 per person are available. Travel duration is 27h 21m
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Greyhound US30h 50m01:20 AMSt. Louis, MOGateway Station6:10 AMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 4/24/2026 1:20:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/25/2026 6:10:00 AM. 50 Economy ticket for $110 per person are available. Travel duration is 30h 50m
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Greyhound US30h 0m08:40 AMSt. Louis, MOGateway Station12:40 PMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 4/24/2026 8:40:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/25/2026 12:40:00 PM. 50 Economy ticket for $113 per person are available. Travel duration is 30h 0m
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Greyhound US29h 30m09:10 AMSt. Louis Lambert AirportSt. Louis Lambert Airport12:40 PMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/24/2026 9:10:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/25/2026 12:40:00 PM. 50 Economy ticket for $113 per person are available. Travel duration is 29h 30m
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Greyhound US39h 40m04:30 PMSt. Louis, MOGateway Station6:10 AMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 4/24/2026 4:30:00 PM to Bus Station, Phoenix, AZ (USA) arriving at 4/26/2026 6:10:00 AM. 50 Economy ticket for $151 per person are available. Travel duration is 39h 40m
Cheapest Flights Friday
Cheapest Buses Friday
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Frontier Airlines8h 2m04:16 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:18 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/25/2026 4:16:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/25/2026 10:18:00 PM. 50 Economy ticket for $80 per person are available. Travel duration is 8h 2m
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Frontier Airlines5h 25m08:17 PMSt. Louis Lambert AirportSt. Louis Lambert Airport11:42 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/25/2026 8:17:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/25/2026 11:42:00 PM. 50 Economy ticket for $80 per person are available. Travel duration is 5h 25m
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Frontier Airlines28h 10m08:17 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:27 PMPhoenix-Mesa Gateway AirportBus Stop0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/25/2026 8:17:00 PM to Bus Stop, Phoenix-Mesa Gateway Airport (USA) arriving at 4/26/2026 10:27:00 PM. 50 Economy ticket for $167 per person are available. Travel duration is 28h 10m
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United Airlines7h 9m06:00 AMSt. Louis Lambert AirportSt. Louis Lambert Airport11:09 AMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/25/2026 6:00:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/25/2026 11:09:00 AM. 50 Economy ticket for $171 per person are available. Travel duration is 7h 9m
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United Airlines6h 50m06:30 AMSt. Louis Lambert AirportSt. Louis Lambert Airport11:20 AMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/25/2026 6:30:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/25/2026 11:20:00 AM. 50 Economy ticket for $171 per person are available. Travel duration is 6h 50m
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Frontier Airlines25h 57m08:17 PMSt. Louis Lambert AirportSt. Louis Lambert Airport8:14 PMPhoenix-Mesa Gateway AirportBus Stop0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/25/2026 8:17:00 PM to Bus Stop, Phoenix-Mesa Gateway Airport (USA) arriving at 4/26/2026 8:14:00 PM. 50 Economy ticket for $197 per person are available. Travel duration is 25h 57m
Cheapest Flights Saturday
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Frontier Airlines8h 19m04:59 PMSt. Louis Lambert AirportSt. Louis Lambert Airport11:18 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/26/2026 4:59:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/26/2026 11:18:00 PM. 50 Economy ticket for $79 per person are available. Travel duration is 8h 19m
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Frontier Airlines36h 25m011:44 AMSt. Louis Lambert AirportSt. Louis Lambert Airport10:09 PMPhoenix-Mesa Gateway AirportBus Stop0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/26/2026 11:44:00 AM to Bus Stop, Phoenix-Mesa Gateway Airport (USA) arriving at 4/27/2026 10:09:00 PM. 50 Economy ticket for $236 per person are available. Travel duration is 36h 25m
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United Airlines6h 4m06:05 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:09 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/26/2026 6:05:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/26/2026 10:09:00 PM. 50 Economy ticket for $252 per person are available. Travel duration is 6h 4m
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Frontier Airlines21h 32m04:59 PMSt. Louis Lambert AirportSt. Louis Lambert Airport12:31 PMPhoenix-Mesa Gateway AirportBus Stop0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/26/2026 4:59:00 PM to Bus Stop, Phoenix-Mesa Gateway Airport (USA) arriving at 4/27/2026 12:31:00 PM. 50 Economy ticket for $269 per person are available. Travel duration is 21h 32m
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Allegiant Air38h 20m011:01 AMMidAmerica St. Louis AirportMidAmerica St. Louis Airport11:21 PMPhoenix-Mesa Gateway AirportBus Stop0EconomyA Flight from Allegiant Air goes from MidAmerica St. Louis Airport, MidAmerica St. Louis Airport (USA) at 4/26/2026 11:01:00 AM to Bus Stop, Phoenix-Mesa Gateway Airport (USA) arriving at 4/27/2026 11:21:00 PM. 50 Economy ticket for $286 per person are available. Travel duration is 38h 20m
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Alaska Airlines10h 0m07:00 AMSt. Louis Lambert AirportSt. Louis Lambert Airport3:00 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/26/2026 7:00:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/26/2026 3:00:00 PM. 50 Economy ticket for $306 per person are available. Travel duration is 10h 0m
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Greyhound US30h 50m01:20 AMSt. Louis, MOGateway Station6:10 AMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 4/26/2026 1:20:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/27/2026 6:10:00 AM. 50 Economy ticket for $112 per person are available. Travel duration is 30h 50m
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Greyhound US30h 0m08:40 AMSt. Louis, MOGateway Station12:40 PMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 4/26/2026 8:40:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/27/2026 12:40:00 PM. 50 Economy ticket for $116 per person are available. Travel duration is 30h 0m
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Greyhound US29h 30m09:10 AMSt. Louis Lambert AirportSt. Louis Lambert Airport12:40 PMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/26/2026 9:10:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/27/2026 12:40:00 PM. 50 Economy ticket for $120 per person are available. Travel duration is 29h 30m
Cheapest Flights Sunday
Cheapest Buses Sunday
What are the fastest trips from St. Louis, MO to Phoenix, AZ?
You can get to Phoenix, AZ from St. Louis, MO in just 5h 25m with a Flight from Frontier Airlines. This is not the only option, and you can click on any of the offers below to compare it with the other modes of transportations.
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Frontier Airlines6h 2m03:21 PMSt. Louis Lambert AirportSt. Louis Lambert Airport7:23 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/20/2026 3:21:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/20/2026 7:23:00 PM. 50 Economy ticket for $80 per person are available. Travel duration is 6h 2m
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United Airlines9h 13m07:45 AMSt. Louis Lambert AirportSt. Louis Lambert Airport2:58 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/20/2026 7:45:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/20/2026 2:58:00 PM. 50 Economy ticket for $221 per person are available. Travel duration is 9h 13m
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Hawaiian Airlines10h 2m07:00 AMSt. Louis Lambert AirportSt. Louis Lambert Airport3:02 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Hawaiian Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/20/2026 7:00:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/20/2026 3:02:00 PM. 50 Economy ticket for $329 per person are available. Travel duration is 10h 2m
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American Airlines11h 19m05:20 AMSt. Louis Lambert AirportSt. Louis Lambert Airport2:39 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from American Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/20/2026 5:20:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/20/2026 2:39:00 PM. 50 Economy ticket for $314 per person are available. Travel duration is 11h 19m
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Alaska Airlines12h 46m07:00 AMSt. Louis Lambert AirportSt. Louis Lambert Airport5:46 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/20/2026 7:00:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/20/2026 5:46:00 PM. 50 Economy ticket for $298 per person are available. Travel duration is 12h 46m
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Frontier Airlines45h 10m04:59 PMSt. Louis Lambert AirportSt. Louis Lambert Airport12:09 PMPhoenix-Mesa Gateway AirportBus Stop0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/20/2026 4:59:00 PM to Bus Stop, Phoenix-Mesa Gateway Airport (USA) arriving at 4/22/2026 12:09:00 PM. 50 Economy ticket for $270 per person are available. Travel duration is 45h 10m
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Greyhound US29h 30m09:10 AMSt. Louis Lambert AirportSt. Louis Lambert Airport12:40 PMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/20/2026 9:10:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/21/2026 12:40:00 PM. 50 Economy ticket for $110 per person are available. Travel duration is 29h 30m
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Greyhound US30h 0m08:40 AMSt. Louis, MOGateway Station12:40 PMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 4/20/2026 8:40:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/21/2026 12:40:00 PM. 50 Economy ticket for $106 per person are available. Travel duration is 30h 0m
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Greyhound US30h 50m01:20 AMSt. Louis, MOGateway Station6:10 AMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 4/20/2026 1:20:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/21/2026 6:10:00 AM. 50 Economy ticket for $106 per person are available. Travel duration is 30h 50m
Fastest Flights Monday
Fastest Buses Monday
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United Airlines7h 9m06:00 AMSt. Louis Lambert AirportSt. Louis Lambert Airport11:09 AMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/21/2026 6:00:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/21/2026 11:09:00 AM. 50 Economy ticket for $227 per person are available. Travel duration is 7h 9m
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Frontier Airlines8h 19m04:59 PMSt. Louis Lambert AirportSt. Louis Lambert Airport11:18 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/21/2026 4:59:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/21/2026 11:18:00 PM. 50 Economy ticket for $127 per person are available. Travel duration is 8h 19m
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Alaska Airlines10h 2m07:00 AMSt. Louis Lambert AirportSt. Louis Lambert Airport3:02 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/21/2026 7:00:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/21/2026 3:02:00 PM. 50 Economy ticket for $182 per person are available. Travel duration is 10h 2m
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Hawaiian Airlines10h 53m07:00 AMSt. Louis Lambert AirportSt. Louis Lambert Airport3:53 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Hawaiian Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/21/2026 7:00:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/21/2026 3:53:00 PM. 50 Economy ticket for $188 per person are available. Travel duration is 10h 53m
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American Airlines11h 19m05:20 AMSt. Louis Lambert AirportSt. Louis Lambert Airport2:39 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from American Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/21/2026 5:20:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/21/2026 2:39:00 PM. 50 Economy ticket for $269 per person are available. Travel duration is 11h 19m
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Frontier Airlines21h 10m04:59 PMSt. Louis Lambert AirportSt. Louis Lambert Airport12:09 PMPhoenix-Mesa Gateway AirportBus Stop0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/21/2026 4:59:00 PM to Bus Stop, Phoenix-Mesa Gateway Airport (USA) arriving at 4/22/2026 12:09:00 PM. 50 Economy ticket for $225 per person are available. Travel duration is 21h 10m
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Greyhound US29h 30m09:10 AMSt. Louis Lambert AirportSt. Louis Lambert Airport12:40 PMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/21/2026 9:10:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/22/2026 12:40:00 PM. 50 Economy ticket for $107 per person are available. Travel duration is 29h 30m
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Greyhound US30h 0m08:40 AMSt. Louis, MOGateway Station12:40 PMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 4/21/2026 8:40:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/22/2026 12:40:00 PM. 50 Economy ticket for $103 per person are available. Travel duration is 30h 0m
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Greyhound US30h 50m01:20 AMSt. Louis, MOGateway Station6:10 AMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 4/21/2026 1:20:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/22/2026 6:10:00 AM. 50 Economy ticket for $103 per person are available. Travel duration is 30h 50m
Fastest Flights Tuesday
Fastest Buses Tuesday
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United Airlines6h 4m06:05 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:09 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/22/2026 6:05:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/22/2026 10:09:00 PM. 50 Economy ticket for $222 per person are available. Travel duration is 6h 4m
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Frontier Airlines8h 4m04:59 PMSt. Louis Lambert AirportSt. Louis Lambert Airport11:03 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/22/2026 4:59:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/22/2026 11:03:00 PM. 50 Economy ticket for $80 per person are available. Travel duration is 8h 4m
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Alaska Airlines9h 13m04:46 PMSt. Louis Lambert AirportSt. Louis Lambert Airport11:59 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/22/2026 4:46:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/22/2026 11:59:00 PM. 50 Economy ticket for $208 per person are available. Travel duration is 9h 13m
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Alaska Airlines10h 0m07:00 AMSt. Louis Lambert AirportSt. Louis Lambert Airport3:00 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/22/2026 7:00:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/22/2026 3:00:00 PM. 50 Economy ticket for $208 per person are available. Travel duration is 10h 0m
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Frontier Airlines25h 2m04:59 PMSt. Louis Lambert AirportSt. Louis Lambert Airport4:01 PMPhoenix-Mesa Gateway AirportBus Stop0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/22/2026 4:59:00 PM to Bus Stop, Phoenix-Mesa Gateway Airport (USA) arriving at 4/23/2026 4:01:00 PM. 50 Economy ticket for $374 per person are available. Travel duration is 25h 2m
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Frontier Airlines31h 5m04:59 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:04 PMPhoenix-Mesa Gateway AirportBus Stop0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/22/2026 4:59:00 PM to Bus Stop, Phoenix-Mesa Gateway Airport (USA) arriving at 4/23/2026 10:04:00 PM. 50 Economy ticket for $340 per person are available. Travel duration is 31h 5m
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Greyhound US29h 30m09:10 AMSt. Louis Lambert AirportSt. Louis Lambert Airport12:40 PMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/22/2026 9:10:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/23/2026 12:40:00 PM. 50 Economy ticket for $107 per person are available. Travel duration is 29h 30m
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Greyhound US30h 0m08:40 AMSt. Louis, MOGateway Station12:40 PMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 4/22/2026 8:40:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/23/2026 12:40:00 PM. 50 Economy ticket for $103 per person are available. Travel duration is 30h 0m
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Greyhound US30h 50m01:20 AMSt. Louis, MOGateway Station6:10 AMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 4/22/2026 1:20:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/23/2026 6:10:00 AM. 50 Economy ticket for $103 per person are available. Travel duration is 30h 50m
Fastest Flights Wednesday
Fastest Buses Wednesday
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Frontier Airlines5h 36m08:06 PMSt. Louis Lambert AirportSt. Louis Lambert Airport11:42 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/23/2026 8:06:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/23/2026 11:42:00 PM. 50 Economy ticket for $105 per person are available. Travel duration is 5h 36m
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United Airlines6h 4m06:05 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:09 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/23/2026 6:05:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/23/2026 10:09:00 PM. 50 Economy ticket for $282 per person are available. Travel duration is 6h 4m
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Alaska Airlines9h 13m04:46 PMSt. Louis Lambert AirportSt. Louis Lambert Airport11:59 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/23/2026 4:46:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/23/2026 11:59:00 PM. 50 Economy ticket for $338 per person are available. Travel duration is 9h 13m
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Allegiant Air10h 41m012:14 PMMidAmerica St. Louis AirportMidAmerica St. Louis Airport8:55 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Allegiant Air goes from MidAmerica St. Louis Airport, MidAmerica St. Louis Airport (USA) at 4/23/2026 12:14:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/23/2026 8:55:00 PM. 50 Economy ticket for $236 per person are available. Travel duration is 10h 41m
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American Airlines12h 4m012:27 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:31 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from American Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/23/2026 12:27:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/23/2026 10:31:00 PM. 50 Economy ticket for $315 per person are available. Travel duration is 12h 4m
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Frontier Airlines36h 44m011:25 AMSt. Louis Lambert AirportSt. Louis Lambert Airport10:09 PMPhoenix-Mesa Gateway AirportBus Stop0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/23/2026 11:25:00 AM to Bus Stop, Phoenix-Mesa Gateway Airport (USA) arriving at 4/24/2026 10:09:00 PM. 50 Economy ticket for $221 per person are available. Travel duration is 36h 44m
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Greyhound US30h 0m08:40 AMSt. Louis, MOGateway Station12:40 PMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 4/23/2026 8:40:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/24/2026 12:40:00 PM. 50 Economy ticket for $106 per person are available. Travel duration is 30h 0m
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Greyhound US30h 50m01:20 AMSt. Louis, MOGateway Station6:10 AMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 4/23/2026 1:20:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/24/2026 6:10:00 AM. 50 Economy ticket for $103 per person are available. Travel duration is 30h 50m
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Greyhound US39h 40m04:30 PMSt. Louis, MOGateway Station6:10 AMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 4/23/2026 4:30:00 PM to Bus Station, Phoenix, AZ (USA) arriving at 4/25/2026 6:10:00 AM. 50 Economy ticket for $148 per person are available. Travel duration is 39h 40m
Fastest Flights Thursday
Fastest Buses Thursday
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United Airlines6h 4m06:05 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:09 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/24/2026 6:05:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/24/2026 10:09:00 PM. 50 Economy ticket for $242 per person are available. Travel duration is 6h 4m
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United Airlines7h 26m07:45 AMSt. Louis Lambert AirportSt. Louis Lambert Airport1:11 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/24/2026 7:45:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/24/2026 1:11:00 PM. 50 Economy ticket for $247 per person are available. Travel duration is 7h 26m
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Frontier Airlines8h 19m04:59 PMSt. Louis Lambert AirportSt. Louis Lambert Airport11:18 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/24/2026 4:59:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/24/2026 11:18:00 PM. 50 Economy ticket for $82 per person are available. Travel duration is 8h 19m
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Alaska Airlines10h 0m07:00 AMSt. Louis Lambert AirportSt. Louis Lambert Airport3:00 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/24/2026 7:00:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/24/2026 3:00:00 PM. 50 Economy ticket for $321 per person are available. Travel duration is 10h 0m
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Frontier Airlines20h 54m09:58 PMSt. Louis Lambert AirportSt. Louis Lambert Airport4:52 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/24/2026 9:58:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/25/2026 4:52:00 PM. 50 Economy ticket for $87 per person are available. Travel duration is 20h 54m
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Frontier Airlines27h 21m04:59 PMSt. Louis Lambert AirportSt. Louis Lambert Airport6:20 PMPhoenix-Mesa Gateway AirportBus Stop0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/24/2026 4:59:00 PM to Bus Stop, Phoenix-Mesa Gateway Airport (USA) arriving at 4/25/2026 6:20:00 PM. 50 Economy ticket for $260 per person are available. Travel duration is 27h 21m
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Greyhound US29h 30m09:10 AMSt. Louis Lambert AirportSt. Louis Lambert Airport12:40 PMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/24/2026 9:10:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/25/2026 12:40:00 PM. 50 Economy ticket for $113 per person are available. Travel duration is 29h 30m
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Greyhound US30h 0m08:40 AMSt. Louis, MOGateway Station12:40 PMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 4/24/2026 8:40:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/25/2026 12:40:00 PM. 50 Economy ticket for $113 per person are available. Travel duration is 30h 0m
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Greyhound US30h 50m01:20 AMSt. Louis, MOGateway Station6:10 AMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 4/24/2026 1:20:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/25/2026 6:10:00 AM. 50 Economy ticket for $110 per person are available. Travel duration is 30h 50m
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Greyhound US39h 40m04:30 PMSt. Louis, MOGateway Station6:10 AMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 4/24/2026 4:30:00 PM to Bus Station, Phoenix, AZ (USA) arriving at 4/26/2026 6:10:00 AM. 50 Economy ticket for $151 per person are available. Travel duration is 39h 40m
Fastest Flights Friday
Fastest Buses Friday
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Frontier Airlines5h 25m08:17 PMSt. Louis Lambert AirportSt. Louis Lambert Airport11:42 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/25/2026 8:17:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/25/2026 11:42:00 PM. 50 Economy ticket for $80 per person are available. Travel duration is 5h 25m
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United Airlines6h 50m06:30 AMSt. Louis Lambert AirportSt. Louis Lambert Airport11:20 AMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/25/2026 6:30:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/25/2026 11:20:00 AM. 50 Economy ticket for $171 per person are available. Travel duration is 6h 50m
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United Airlines7h 9m06:00 AMSt. Louis Lambert AirportSt. Louis Lambert Airport11:09 AMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/25/2026 6:00:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/25/2026 11:09:00 AM. 50 Economy ticket for $171 per person are available. Travel duration is 7h 9m
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Frontier Airlines8h 2m04:16 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:18 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/25/2026 4:16:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/25/2026 10:18:00 PM. 50 Economy ticket for $80 per person are available. Travel duration is 8h 2m
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Alaska Airlines10h 0m07:00 AMSt. Louis Lambert AirportSt. Louis Lambert Airport3:00 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/25/2026 7:00:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/25/2026 3:00:00 PM. 50 Economy ticket for $402 per person are available. Travel duration is 10h 0m
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Frontier Airlines25h 57m08:17 PMSt. Louis Lambert AirportSt. Louis Lambert Airport8:14 PMPhoenix-Mesa Gateway AirportBus Stop0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/25/2026 8:17:00 PM to Bus Stop, Phoenix-Mesa Gateway Airport (USA) arriving at 4/26/2026 8:14:00 PM. 50 Economy ticket for $197 per person are available. Travel duration is 25h 57m
Fastest Flights Saturday
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United Airlines6h 4m06:05 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:09 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/26/2026 6:05:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/26/2026 10:09:00 PM. 50 Economy ticket for $252 per person are available. Travel duration is 6h 4m
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Frontier Airlines8h 19m04:59 PMSt. Louis Lambert AirportSt. Louis Lambert Airport11:18 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/26/2026 4:59:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/26/2026 11:18:00 PM. 50 Economy ticket for $79 per person are available. Travel duration is 8h 19m
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Alaska Airlines10h 0m07:00 AMSt. Louis Lambert AirportSt. Louis Lambert Airport3:00 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/26/2026 7:00:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/26/2026 3:00:00 PM. 50 Economy ticket for $306 per person are available. Travel duration is 10h 0m
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Allegiant Air10h 11m012:14 PMMidAmerica St. Louis AirportMidAmerica St. Louis Airport8:25 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Allegiant Air goes from MidAmerica St. Louis Airport, MidAmerica St. Louis Airport (USA) at 4/26/2026 12:14:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/26/2026 8:25:00 PM. 50 Economy ticket for $386 per person are available. Travel duration is 10h 11m
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American Airlines11h 10m05:51 AMSt. Louis Lambert AirportSt. Louis Lambert Airport3:01 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from American Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/26/2026 5:51:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 4/26/2026 3:01:00 PM. 50 Economy ticket for $616 per person are available. Travel duration is 11h 10m
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Frontier Airlines21h 32m04:59 PMSt. Louis Lambert AirportSt. Louis Lambert Airport12:31 PMPhoenix-Mesa Gateway AirportBus Stop0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/26/2026 4:59:00 PM to Bus Stop, Phoenix-Mesa Gateway Airport (USA) arriving at 4/27/2026 12:31:00 PM. 50 Economy ticket for $269 per person are available. Travel duration is 21h 32m
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Greyhound US29h 30m09:10 AMSt. Louis Lambert AirportSt. Louis Lambert Airport12:40 PMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 4/26/2026 9:10:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/27/2026 12:40:00 PM. 50 Economy ticket for $120 per person are available. Travel duration is 29h 30m
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Greyhound US30h 0m08:40 AMSt. Louis, MOGateway Station12:40 PMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 4/26/2026 8:40:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/27/2026 12:40:00 PM. 50 Economy ticket for $116 per person are available. Travel duration is 30h 0m
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Greyhound US30h 50m01:20 AMSt. Louis, MOGateway Station6:10 AMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 4/26/2026 1:20:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 4/27/2026 6:10:00 AM. 50 Economy ticket for $112 per person are available. Travel duration is 30h 50m
Fastest Flights Sunday
Fastest Buses Sunday
Here you will find all operators and timetables for a
Bus from St. Louis, MO to Phoenix, AZ
What are the most popular stations in St. Louis, MO and Phoenix, AZ?
In St. Louis, MO, you will usually depart from Gateway Station, Lindbergh @ Hackberry NB Bus Stop or Skinker Boulevard, while in Phoenix, AZ you will be arriving at Washington St & 4th Av Bus Stop, 7th St & Roosevelt St Bus Stop or 24th St & Jefferson St Station, but there are many more stops to explore in both locations.
How do I decide? Some tips and tricks from our experience
Are you having trouble deciding on how to get to Phoenix, AZ from St. Louis, MO? With 13 connections between 1 Flight and Bus operators, it can be difficult to find the one ride that will make you happy. But we have some tips that can help you make the best informed decision. First of all, the best trip is always the one that meets all your needs, so make a list of all the things that you want from this journey and look for something that will satisfy all of them. Here we will go through some of the factors mostly commonly taken into consideration.
Look for the lowest price
Ticket price is usually the main concern: even if you can afford to pay more, why do it if there are cheaper options? Saving on the trip means that you can spend more on the vacation itself! Between St. Louis, MO and Phoenix, AZ, you can pay as low as $79 with a Flight from Frontier Airlines.Travel duration
Time is also an important factor. An earlier departure may allow you to see a beautiful sunset or relax before an important event. And remember, time is money, so paying more for a shorter trip may be well worth it. For longer distances, flights are without doubt the best options, but be mindful of airport times and possible delays: a high-speed train may end up cheaper and faster! Here the quicker option is definitely the Flight from Frontier Airlines: you will get to Phoenix, AZ in just 5h 25m.Comfort makes all the difference
You should always take into account what your personal travelling preferences are. Is one hand luggage enough, or are you trasporting more? Would you like to have a snack during the journey? Can you relax in a busy compartment, or do you need space for yourself? Even among the same mode of transportation, different companies will offer you varying levels of comfort and amenities. The main operators connecting St. Louis, MO and Phoenix, AZ are Frontier Airlines, Greyhound US and Allegiant Air, but be sure to check what they have to offer!Save money with deals, and always compare
One last tip? Even if you live in St. Louis, MO and Phoenix, AZ is your only destination, it may be wise to check the offers from and to nearby cities or, if you are flyng, nearby airports. Check the trips from Sauget, IL or to Phoenix Sky Harbor Airport, and look at flights from St. Louis Lambert Airport, and landing at Phoenix-Deer Valley Airport. Comparing different routes may allow you to find deals or promotions you were not aware of. Consider also signing up to CheckMyBus to see even more exclusive promotions!Which companies offer a trip from St. Louis, MO to Phoenix, AZ?
The most popular companies between St. Louis, MO and Phoenix, AZ, are Frontier Airlines, Greyhound US and Allegiant Air. Be sure to check their seat class offers and the amenities that they provide.
Bus companies: Greyhound US
Airlines: Frontier Airlines, Allegiant Air, United Airlines and 3 more.
All you need to know when you travel from St. Louis, MO to Phoenix, AZ
Check all information on comfort and services on all modes of transports from St. Louis, MO to Phoenix, AZ. See which seat classes are available, and what amenities are other advantages offered by the operators on your journey.
FAQs about the trip from St. Louis, MO to Phoenix, AZ
How can I reach Phoenix, AZ from St. Louis, MO?
Every day, there are on average 13 connections between Flight and Bus, with which you can get to Phoenix, AZ from St. Louis, MO.
How far is Phoenix, AZ from St. Louis, MO?
The distance between St. Louis, MO and Phoenix, AZ is 1,270.1 miles.
What is the most ecofriendly mode of transport between St. Louis, MO and Phoenix, AZ?
Trains and buses are by far the greenest options, with trains surpassing buses on longer routes. Planes will always be the worst polluters, especially in shorter flights, were the emissions from the takeoff and landing are less offset by the distance.
On this particular route, a bus will emit, per person, a total of 55 kgs of CO2, a train 72 kgs, a car 347 kgs, and a flight 503 kgs.
What is the cheapest mode of transport from St. Louis, MO to Phoenix, AZ?
You can get to Phoenix, AZ with just $79 by taking a Flight from Frontier Airlines.
What is the fastest way to get from St. Louis, MO to Phoenix, AZ?
While a plane is travelling fastest boarding and transfer to airport consumes a lot of time. Usually, high speed trains are better than flights if pure train travel time is below 4 hours. For this particular route, you can get to Phoenix, AZ in just 5h 25m with a Flight from Frontier Airlines.
More routes to St. Louis, MO and to Phoenix, AZ
Looking for more options? Here you can see the most popular routes to St. Louis, MO and to Phoenix, AZ. Simply click on a connection, and you’ll find all the details about the route!
