What is the best way to travel from St. Louis, MO to Phoenix, AZ?
Looking for a trip? Compare all the available Buses and Flights 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 $59 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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Alaska Airlines8h 56m02:50 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:46 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/20/2026 2:50:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/20/2026 10:46:00 PM. 50 Economy ticket for $420 per person are available. Travel duration is 8h 56m
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Alaska Airlines10h 9m02:50 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 1/20/2026 2:50:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/20/2026 11:59:00 PM. 50 Economy ticket for $420 per person are available. Travel duration is 10h 9m
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Hawaiian Airlines8h 56m02:50 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:46 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Hawaiian Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/20/2026 2:50:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/20/2026 10:46:00 PM. 50 Economy ticket for $433 per person are available. Travel duration is 8h 56m
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Hawaiian Airlines10h 9m02:50 PMSt. Louis Lambert AirportSt. Louis Lambert Airport11:59 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Hawaiian Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/20/2026 2:50:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/20/2026 11:59:00 PM. 50 Economy ticket for $433 per person are available. Travel duration is 10h 9m
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United Airlines14h 30m07:00 AMSt. Louis Lambert AirportSt. Louis Lambert Airport8:30 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/20/2026 7:00:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/20/2026 8:30:00 PM. 50 Economy ticket for $447 per person are available. Travel duration is 14h 30m
Cheapest Flights Tuesday
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Frontier Airlines9h 7m03:46 PMSt. Louis Lambert AirportSt. Louis Lambert Airport11:53 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/21/2026 3:46:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/21/2026 11:53:00 PM. 50 Economy ticket for $96 per person are available. Travel duration is 9h 7m
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Frontier Airlines24h 38m03:46 PMSt. Louis Lambert AirportSt. Louis Lambert Airport3:24 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/21/2026 3:46:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/22/2026 3:24:00 PM. 50 Economy ticket for $188 per person are available. Travel duration is 24h 38m
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Alaska Airlines21h 9m02:50 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:59 AMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/21/2026 2:50:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/22/2026 10:59:00 AM. 50 Economy ticket for $397 per person are available. Travel duration is 21h 9m
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Alaska Airlines8h 56m02:50 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:46 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/21/2026 2:50:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/21/2026 10:46:00 PM. 50 Economy ticket for $440 per person are available. Travel duration is 8h 56m
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United Airlines5h 45m08:45 AMSt. Louis Lambert AirportSt. Louis Lambert Airport1:30 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/21/2026 8:45:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/21/2026 1:30:00 PM. 50 Economy ticket for $449 per person are available. Travel duration is 5h 45m
Cheapest Flights Wednesday
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Greyhound US30h 0m08:40 AMSt. Louis, MOGateway Station1:40 PMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 1/22/2026 8:40:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 1/23/2026 1:40:00 PM. 50 Economy ticket for $123 per person are available. Travel duration is 30h 0m
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Greyhound US30h 50m01:20 AMSt. Louis, MOGateway Station7:10 AMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 1/22/2026 1:20:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 1/23/2026 7:10:00 AM. 50 Economy ticket for $127 per person are available. Travel duration is 30h 50m
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Greyhound US39h 40m04:30 PMSt. Louis, MOGateway Station7:10 AMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 1/22/2026 4:30:00 PM to Bus Station, Phoenix, AZ (USA) arriving at 1/24/2026 7:10:00 AM. 50 Economy ticket for $192 per person are available. Travel duration is 39h 40m
Cheapest Buses Thursday
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Frontier Airlines3h 41m01:03 PMSt. Louis Lambert AirportSt. Louis Lambert Airport3:44 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/23/2026 1:03:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/23/2026 3:44:00 PM. 50 Economy ticket for $59 per person are available. Travel duration is 3h 41m
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Frontier Airlines6h 1m07:39 PMSt. Louis Lambert AirportSt. Louis Lambert Airport12:40 AMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/23/2026 7:39:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/24/2026 12:40:00 AM. 50 Economy ticket for $145 per person are available. Travel duration is 6h 1m
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United Airlines15h 14m08:45 AMSt. Louis Lambert AirportSt. Louis Lambert Airport10:59 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/23/2026 8:45:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/23/2026 10:59:00 PM. 50 Economy ticket for $426 per person are available. Travel duration is 15h 14m
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United Airlines14h 9m08:45 AMSt. Louis Lambert AirportSt. Louis Lambert Airport9:54 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/23/2026 8:45:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/23/2026 9:54:00 PM. 50 Economy ticket for $426 per person are available. Travel duration is 14h 9m
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Alaska Airlines8h 56m02:50 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:46 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/23/2026 2:50:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/23/2026 10:46:00 PM. 50 Economy ticket for $549 per person are available. Travel duration is 8h 56m
Cheapest Flights Friday
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Greyhound US30h 0m08:40 AMSt. Louis, MOGateway Station1:40 PMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 1/24/2026 8:40:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 1/25/2026 1:40:00 PM. 50 Economy ticket for $131 per person are available. Travel duration is 30h 0m
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Greyhound US29h 30m09:10 AMSt. Louis Lambert AirportSt. Louis Lambert Airport1:40 PMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/24/2026 9:10:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 1/25/2026 1:40:00 PM. 50 Economy ticket for $131 per person are available. Travel duration is 29h 30m
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Greyhound US30h 50m01:20 AMSt. Louis, MOGateway Station7:10 AMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 1/24/2026 1:20:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 1/25/2026 7:10:00 AM. 50 Economy ticket for $135 per person are available. Travel duration is 30h 50m
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Greyhound US39h 40m04:30 PMSt. Louis, MOGateway Station7:10 AMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 1/24/2026 4:30:00 PM to Bus Station, Phoenix, AZ (USA) arriving at 1/26/2026 7:10:00 AM. 50 Economy ticket for $173 per person are available. Travel duration is 39h 40m
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Frontier Airlines9h 7m03:46 PMSt. Louis Lambert AirportSt. Louis Lambert Airport11:53 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/24/2026 3:46:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/24/2026 11:53:00 PM. 50 Economy ticket for $243 per person are available. Travel duration is 9h 7m
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Frontier Airlines17h 26m03:46 PMSt. Louis Lambert AirportSt. Louis Lambert Airport8:12 AMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/24/2026 3:46:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/25/2026 8:12:00 AM. 50 Economy ticket for $265 per person are available. Travel duration is 17h 26m
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United Airlines14h 9m08:45 AMSt. Louis Lambert AirportSt. Louis Lambert Airport9:54 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/24/2026 8:45:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/24/2026 9:54:00 PM. 50 Economy ticket for $387 per person are available. Travel duration is 14h 9m
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United Airlines18h 39m04:15 PMSt. Louis Lambert AirportSt. Louis Lambert Airport9:54 AMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/24/2026 4:15:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/25/2026 9:54:00 AM. 50 Economy ticket for $407 per person are available. Travel duration is 18h 39m
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Alaska Airlines20h 55m06:19 PMSt. Louis Lambert AirportSt. Louis Lambert Airport2:14 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/24/2026 6:19:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/25/2026 2:14:00 PM. 50 Economy ticket for $428 per person are available. Travel duration is 20h 55m
Cheapest Buses Saturday
Cheapest Flights Saturday
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Frontier Airlines3h 41m01:03 PMSt. Louis Lambert AirportSt. Louis Lambert Airport3:44 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/25/2026 1:03:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/25/2026 3:44:00 PM. 50 Economy ticket for $69 per person are available. Travel duration is 3h 41m
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Frontier Airlines11h 53m09:27 PMSt. Louis Lambert AirportSt. Louis Lambert Airport8:20 AMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/25/2026 9:27:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/26/2026 8:20:00 AM. 50 Economy ticket for $147 per person are available. Travel duration is 11h 53m
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Alaska Airlines21h 9m02:50 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:59 AMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/25/2026 2:50:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/26/2026 10:59:00 AM. 50 Economy ticket for $410 per person are available. Travel duration is 21h 9m
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United Airlines5h 45m08:45 AMSt. Louis Lambert AirportSt. Louis Lambert Airport1:30 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/25/2026 8:45:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/25/2026 1:30:00 PM. 50 Economy ticket for $512 per person are available. Travel duration is 5h 45m
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United Airlines6h 0m02:45 PMSt. Louis Lambert AirportSt. Louis Lambert Airport7:45 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/25/2026 2:45:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/25/2026 7:45:00 PM. 50 Economy ticket for $512 per person are available. Travel duration is 6h 0m
Cheapest Flights Sunday
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Frontier Airlines13h 37m09:45 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:22 AMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/26/2026 9:45:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/27/2026 10:22:00 AM. 50 Economy ticket for $114 per person are available. Travel duration is 13h 37m
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Frontier Airlines12h 0m01:40 PMSt. Louis Lambert AirportSt. Louis Lambert Airport12:40 AMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/26/2026 1:40:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/27/2026 12:40:00 AM. 50 Economy ticket for $117 per person are available. Travel duration is 12h 0m
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United Airlines6h 39m04:15 PMSt. Louis Lambert AirportSt. Louis Lambert Airport9:54 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/26/2026 4:15:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/26/2026 9:54:00 PM. 50 Economy ticket for $453 per person are available. Travel duration is 6h 39m
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Alaska Airlines20h 58m02:50 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:48 AMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/26/2026 2:50:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/27/2026 10:48:00 AM. 50 Economy ticket for $508 per person are available. Travel duration is 20h 58m
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Alaska Airlines8h 56m02:50 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:46 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/26/2026 2:50:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/26/2026 10:46:00 PM. 50 Economy ticket for $548 per person are available. Travel duration is 8h 56m
Cheapest Flights Monday
What are the fastest trips from St. Louis, MO to Phoenix, AZ?
You can get to Phoenix, AZ from St. Louis, MO in just 3h 41m 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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Alaska Airlines8h 56m02:50 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:46 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/20/2026 2:50:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/20/2026 10:46:00 PM. 50 Economy ticket for $420 per person are available. Travel duration is 8h 56m
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Hawaiian Airlines8h 56m02:50 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:46 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Hawaiian Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/20/2026 2:50:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/20/2026 10:46:00 PM. 50 Economy ticket for $433 per person are available. Travel duration is 8h 56m
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Alaska Airlines10h 9m02:50 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 1/20/2026 2:50:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/20/2026 11:59:00 PM. 50 Economy ticket for $420 per person are available. Travel duration is 10h 9m
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Hawaiian Airlines10h 9m02:50 PMSt. Louis Lambert AirportSt. Louis Lambert Airport11:59 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Hawaiian Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/20/2026 2:50:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/20/2026 11:59:00 PM. 50 Economy ticket for $433 per person are available. Travel duration is 10h 9m
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United Airlines14h 30m07:00 AMSt. Louis Lambert AirportSt. Louis Lambert Airport8:30 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/20/2026 7:00:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/20/2026 8:30:00 PM. 50 Economy ticket for $447 per person are available. Travel duration is 14h 30m
Fastest Flights Tuesday
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United Airlines5h 45m08:45 AMSt. Louis Lambert AirportSt. Louis Lambert Airport1:30 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/21/2026 8:45:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/21/2026 1:30:00 PM. 50 Economy ticket for $449 per person are available. Travel duration is 5h 45m
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Alaska Airlines8h 56m02:50 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:46 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/21/2026 2:50:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/21/2026 10:46:00 PM. 50 Economy ticket for $440 per person are available. Travel duration is 8h 56m
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Frontier Airlines9h 7m03:46 PMSt. Louis Lambert AirportSt. Louis Lambert Airport11:53 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/21/2026 3:46:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/21/2026 11:53:00 PM. 50 Economy ticket for $96 per person are available. Travel duration is 9h 7m
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Alaska Airlines21h 9m02:50 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:59 AMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/21/2026 2:50:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/22/2026 10:59:00 AM. 50 Economy ticket for $397 per person are available. Travel duration is 21h 9m
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Frontier Airlines24h 38m03:46 PMSt. Louis Lambert AirportSt. Louis Lambert Airport3:24 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/21/2026 3:46:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/22/2026 3:24:00 PM. 50 Economy ticket for $188 per person are available. Travel duration is 24h 38m
Fastest Flights Wednesday
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Greyhound US30h 0m08:40 AMSt. Louis, MOGateway Station1:40 PMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 1/22/2026 8:40:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 1/23/2026 1:40:00 PM. 50 Economy ticket for $123 per person are available. Travel duration is 30h 0m
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Greyhound US30h 50m01:20 AMSt. Louis, MOGateway Station7:10 AMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 1/22/2026 1:20:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 1/23/2026 7:10:00 AM. 50 Economy ticket for $127 per person are available. Travel duration is 30h 50m
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Greyhound US39h 40m04:30 PMSt. Louis, MOGateway Station7:10 AMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 1/22/2026 4:30:00 PM to Bus Station, Phoenix, AZ (USA) arriving at 1/24/2026 7:10:00 AM. 50 Economy ticket for $192 per person are available. Travel duration is 39h 40m
Fastest Buses Thursday
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Frontier Airlines3h 41m01:03 PMSt. Louis Lambert AirportSt. Louis Lambert Airport3:44 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/23/2026 1:03:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/23/2026 3:44:00 PM. 50 Economy ticket for $59 per person are available. Travel duration is 3h 41m
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Frontier Airlines6h 1m07:39 PMSt. Louis Lambert AirportSt. Louis Lambert Airport12:40 AMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/23/2026 7:39:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/24/2026 12:40:00 AM. 50 Economy ticket for $145 per person are available. Travel duration is 6h 1m
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Alaska Airlines8h 56m02:50 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:46 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/23/2026 2:50:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/23/2026 10:46:00 PM. 50 Economy ticket for $549 per person are available. Travel duration is 8h 56m
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United Airlines14h 9m08:45 AMSt. Louis Lambert AirportSt. Louis Lambert Airport9:54 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/23/2026 8:45:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/23/2026 9:54:00 PM. 50 Economy ticket for $426 per person are available. Travel duration is 14h 9m
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United Airlines15h 14m08:45 AMSt. Louis Lambert AirportSt. Louis Lambert Airport10:59 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/23/2026 8:45:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/23/2026 10:59:00 PM. 50 Economy ticket for $426 per person are available. Travel duration is 15h 14m
Fastest Flights Friday
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Frontier Airlines9h 7m03:46 PMSt. Louis Lambert AirportSt. Louis Lambert Airport11:53 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/24/2026 3:46:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/24/2026 11:53:00 PM. 50 Economy ticket for $243 per person are available. Travel duration is 9h 7m
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United Airlines14h 9m08:45 AMSt. Louis Lambert AirportSt. Louis Lambert Airport9:54 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/24/2026 8:45:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/24/2026 9:54:00 PM. 50 Economy ticket for $387 per person are available. Travel duration is 14h 9m
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Frontier Airlines17h 26m03:46 PMSt. Louis Lambert AirportSt. Louis Lambert Airport8:12 AMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/24/2026 3:46:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/25/2026 8:12:00 AM. 50 Economy ticket for $265 per person are available. Travel duration is 17h 26m
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United Airlines18h 39m04:15 PMSt. Louis Lambert AirportSt. Louis Lambert Airport9:54 AMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/24/2026 4:15:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/25/2026 9:54:00 AM. 50 Economy ticket for $407 per person are available. Travel duration is 18h 39m
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Alaska Airlines20h 55m06:19 PMSt. Louis Lambert AirportSt. Louis Lambert Airport2:14 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/24/2026 6:19:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/25/2026 2:14:00 PM. 50 Economy ticket for $428 per person are available. Travel duration is 20h 55m
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Greyhound US29h 30m09:10 AMSt. Louis Lambert AirportSt. Louis Lambert Airport1:40 PMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/24/2026 9:10:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 1/25/2026 1:40:00 PM. 50 Economy ticket for $131 per person are available. Travel duration is 29h 30m
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Greyhound US30h 0m08:40 AMSt. Louis, MOGateway Station1:40 PMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 1/24/2026 8:40:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 1/25/2026 1:40:00 PM. 50 Economy ticket for $131 per person are available. Travel duration is 30h 0m
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Greyhound US30h 50m01:20 AMSt. Louis, MOGateway Station7:10 AMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 1/24/2026 1:20:00 AM to Bus Station, Phoenix, AZ (USA) arriving at 1/25/2026 7:10:00 AM. 50 Economy ticket for $135 per person are available. Travel duration is 30h 50m
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Greyhound US39h 40m04:30 PMSt. Louis, MOGateway Station7:10 AMPhoenix, AZBus Station0EconomyA Bus from Greyhound US goes from Gateway Station, St. Louis, MO (USA) at 1/24/2026 4:30:00 PM to Bus Station, Phoenix, AZ (USA) arriving at 1/26/2026 7:10:00 AM. 50 Economy ticket for $173 per person are available. Travel duration is 39h 40m
Fastest Flights Saturday
Fastest Buses Saturday
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Frontier Airlines3h 41m01:03 PMSt. Louis Lambert AirportSt. Louis Lambert Airport3:44 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/25/2026 1:03:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/25/2026 3:44:00 PM. 50 Economy ticket for $69 per person are available. Travel duration is 3h 41m
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United Airlines5h 45m08:45 AMSt. Louis Lambert AirportSt. Louis Lambert Airport1:30 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/25/2026 8:45:00 AM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/25/2026 1:30:00 PM. 50 Economy ticket for $512 per person are available. Travel duration is 5h 45m
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United Airlines6h 0m02:45 PMSt. Louis Lambert AirportSt. Louis Lambert Airport7:45 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/25/2026 2:45:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/25/2026 7:45:00 PM. 50 Economy ticket for $512 per person are available. Travel duration is 6h 0m
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Frontier Airlines11h 53m09:27 PMSt. Louis Lambert AirportSt. Louis Lambert Airport8:20 AMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/25/2026 9:27:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/26/2026 8:20:00 AM. 50 Economy ticket for $147 per person are available. Travel duration is 11h 53m
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Alaska Airlines21h 9m02:50 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:59 AMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/25/2026 2:50:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/26/2026 10:59:00 AM. 50 Economy ticket for $410 per person are available. Travel duration is 21h 9m
Fastest Flights Sunday
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United Airlines6h 39m04:15 PMSt. Louis Lambert AirportSt. Louis Lambert Airport9:54 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from United Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/26/2026 4:15:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/26/2026 9:54:00 PM. 50 Economy ticket for $453 per person are available. Travel duration is 6h 39m
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Alaska Airlines8h 56m02:50 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:46 PMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/26/2026 2:50:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/26/2026 10:46:00 PM. 50 Economy ticket for $548 per person are available. Travel duration is 8h 56m
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Frontier Airlines12h 0m01:40 PMSt. Louis Lambert AirportSt. Louis Lambert Airport12:40 AMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/26/2026 1:40:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/27/2026 12:40:00 AM. 50 Economy ticket for $117 per person are available. Travel duration is 12h 0m
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Frontier Airlines13h 37m09:45 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:22 AMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Frontier Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/26/2026 9:45:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/27/2026 10:22:00 AM. 50 Economy ticket for $114 per person are available. Travel duration is 13h 37m
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Alaska Airlines20h 58m02:50 PMSt. Louis Lambert AirportSt. Louis Lambert Airport10:48 AMPhoenix Sky Harbor AirportPhoenix Sky Harbor Airport0EconomyA Flight from Alaska Airlines goes from St. Louis Lambert Airport, St. Louis Lambert Airport (USA) at 1/26/2026 2:50:00 PM to Phoenix Sky Harbor Airport, Phoenix Sky Harbor Airport (USA) arriving at 1/27/2026 10:48:00 AM. 50 Economy ticket for $508 per person are available. Travel duration is 20h 58m
Fastest Flights Monday
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 5 connections between 1 Bus and Flight 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 $59 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 3h 41m.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, Alaska Airlines and United Airlines, 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 Sky Harbor 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, Alaska Airlines and United Airlines. Be sure to check their seat class offers and the amenities that they provide.
Bus companies: Greyhound US
Airlines: Frontier Airlines, Alaska Airlines, United Airlines and 1 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 5 connections between Bus and Flight, 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 $59 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 3h 41m 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!
- Trips to St. Louis, MO
- Atlanta, GA to St. Louis, MO
- Ciudad Juárez to St. Louis, MO
- Dallas to St. Louis, MO
- Houston to St. Louis, MO
- Mexico City to St. Louis, MO
- Monterrey, NL to St. Louis, MO
- Trips to Phoenix, AZ
- Aguascalientes to Phoenix, AZ
- Albuquerque, NM to Phoenix, AZ
- Chihuahua to Phoenix, AZ
- Ciudad Juárez to Phoenix, AZ
- Ciudad Obregón to Phoenix, AZ
- Culiacán Rosales to Phoenix, AZ
- Durango, DG to Phoenix, AZ
- El Paso, TX to Phoenix, AZ
- Guadalajara, JC to Phoenix, AZ
- Hermosillo to Phoenix, AZ
- Houston to Phoenix, AZ
- Las Vegas to Phoenix, AZ
- Los Angeles to Phoenix, AZ
- Mexico City to Phoenix, AZ
- Monterrey, NL to Phoenix, AZ
- Salt Lake City, UT to Phoenix, AZ
- San Bernardino, CA to Phoenix, AZ
- San Diego to Phoenix, AZ
- San Francisco to Phoenix, AZ
- Tijuana, BC to Phoenix, AZ
- Torreón, CO to Phoenix, AZ
- Victorville, CA to Phoenix, AZ
