Taking the bus is not only affordable but it's also eco-friendly thanks to its low carbon emissions. Most companies have also taken giant steps to modernize their fleet. Many, if not more, of the amenities you get when taking the train or flying, can also be found on board a bus. Buses have become the way to travel in the 21st century. Unlike most other transportation modes, if you buy a Cardiff - London Heathrow Airport bus ticket, there’s one operator offering free WiFi: megabus. That way you'll be able to tweet your route or get some work done if you're on business. When you’re taking a bus from London Heathrow Airport to Cardiff, also check whether the bus of your choice is equipped with entertainment systems. Keep in mind that it’s best to check and compare all available offers: The amenities of the different companies serving routes from Cardiff to London Heathrow Airport and back can differ considerably. That's exactly what we're here for: to help you find the right bus. The choice is yours - travel smart!