How to get from Cardiff to London
A real 2-leg route: bus. Door to door 3h 35m, from €21.
We compared the ways to travel from Cardiff to London. The most useful door-to-door route takes 3h 35m by bus, 1 transfer. The two cities are about 223 km apart in a straight line. The price and operators below come from a real route search.
This is the lowest fare we have recorded for this route in the last 14 days.
This fare comes from a search on September 1, 2026 and has not been refreshed since. Run a live search for today's price.
Cardiff to London: cheapest or fastest?
All from the same recent search. Pick a tab: the legs, the timing and the difference from the others all change with it.
- 1Cardiff → Cardiff CastlebusCity transit·10m
- 2Cardiff Castle → London Heathrowbus
FlixBus·3h 05m
The best balance of price and time we found on this route.
How the trip from Cardiff to London works
Start with a City transit bus from Cardiff to Cardiff Castle, about 10 min. Transfer in Cardiff Castle and continue by FlixBus bus on to London Heathrow (3h 5m). In total it's roughly €21 over 3h 35m, 1 transfer.
Along the way to London
DepartureCardiffWhat Omio sells on this route
Omio's own lowest fares, one per mode. These are starting prices for the route in general, not for a date you picked, and they are refreshed once a day.
Omio last refreshed these on Fri, Sep 4
Who runs Cardiff to London
On this route you travel with City transit, FlixBus; Routavio does not add a booking fee.
Cardiff to London: common questions
How long does it take to get from Cardiff to London?+−
The most useful route takes about 3h 35m by bus, 1 transfer.
How far is London from Cardiff?+−
About 223 km in a straight line. The real route on the ground or in the air is longer.
How much does Cardiff to London cost?+−
The best price in our latest search was €21. The exact fare depends on your travel date.
Which operators run Cardiff to London?+−
On this route you travel with City transit, FlixBus.
What is the cheapest way to get from Cardiff to London?+−
Usually a flexible date, or leaving from a nearby airport. A live search puts every option for your dates side by side.
Can I book directly?+−
Yes. Routavio sends you straight to the operator or an independent third-party provider. We never add a booking fee. The final fare and availability are confirmed by that provider.
Where to next
Other ways people search Cardiff to London
- how to get from Cardiff to London
- Cardiff to London travel time
- Cardiff to London distance
- cheapest way from Cardiff to London