We've scanned every flight from Cardiff to Washington DC to find the best deals. If you want a cheap flight, it's best to be as flexible as you can on dates. At the moment, the cheapest flight is on 02 / Apr / 2025. If that day's no good for you, try searching by month to see some alternative dates.
Washington DC Washington Dulles International Airport is just one of the airports in Washington DC. If you're not set on a specific airport, try changing your search from Washington DC Washington Dulles International Airport to Washington DC to see a broader range of flights – they might be cheaper. It usually takes about 17 hrs 50 mins to fly 5718 km to Washington DC Washington Dulles International Airport.
20 flights go to or via Washington DC every week. Cheap flights Currently, the cheapest price available is £978. The most popular airline is Virgin Atlantic but do spend some time checking all your options – they aren’t necessarily the cheapest airline to book with.
You can expect accommodation prices to be higher at this time of year too. Last-minute deals do crop up, but it's best to book everything in advance to avoid disappointment.
