We've gone through lots of different flights, to help you find the cheapest way to get from London Heathrow to Cardiff. You can choose from one airlines. At the moment, 30 / Sep / 2025 is the cheapest date to travel, but scroll through the results to find the option that works best for you.
There are 16 flights from London Heathrow to or via Cardiff every week. Out of the one available airlines, the most popular ones are British Airways. But that doesn’t necessarily mean they’ll be the best option for your travel dates. To see as many flights as possible, try widening your search to include other departure airports.
Generally speaking, the flight from London Heathrow to Cardiff takes around 3 hrs 30 mins. The fastest flight takes 3 hrs 30 mins to cover the 200 km distance. You can view all flight times yourself in the results list.
You can also search by month, which will reveal the cheapest time of the week to fly.
