Cheap flights from Cardiff to Washington DC Washington Dulles International Airport

from as little as £616

14 nights in Washington DC, departing Cardiff on 23 / Sep / 2025 with Virgin Atlantic (price found 9 hours ago)

Subject to availability, prices correct of the last 24 hours
Washington DC Washington Dulles International Airport

Cheap return flights from Cardiff to Washington DC Washington Dulles International Airport

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The Cardiff / Washington DC Washington Dulles International Airport route

All 5718 km of it

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Washington DC Washington Dulles International Airport flight facts

What you need to know

Alternative flights from the UK to Washington DC Washington Dulles International Airport

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Washington DC Washington Dulles International Airport

23 / Sep / 2025 is currently the lowest priced day of the year to fly the Cardiff/Washington DC Washington Dulles International Airport route. There are around ten flights on any given week from the UK to Washington DC Washington Dulles International Airport and the cheapest month to fly right now is September.

Not suitable? Try running another search or viewing all cheap flight deals.

Min / Max Temperature (°C)
LOWEST

-4 °C

AVG

13 °C

HIGHEST

31 °C

Rainfall (mm)
LOWEST

68.6 mm

AVG

88.3 mm

HIGHEST

116.8 mm

Key facts about Washington DC Washington Dulles International Airport

How to get cheap flights from Cardiff to Washington DC Washington Dulles International Airport

Tips and advice from our flight experts

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 23 / Sep / 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 10 hrs 45 mins to fly 5718 km to Washington DC Washington Dulles International Airport.

ten flights go to or via Washington DC every week. Cheap flights Currently, the cheapest price available is £616. 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.

Other popular destinations near Washington DC Washington Dulles International Airport

Where other people are flying to

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