Cheap flights from Washington D.C. to Cardiff

Compare Washington D.C. to Cardiff flight deals

Find the cheapest month or even day of the year to fly to Cardiff

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Find the cheapest month to fly from Washington D.C. to Cardiff

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Washington D.C. to Cardiff flights are currently cheapest in February.

Washington D.C. to Cardiff: Alternative routes

Compare routes from Washington D.C. to Cardiff below. You may find an airport to fly into that's cheaper, faster, or easier than Cardiff.

Washington D.C. to Cardiff: Flight information

The things to know before you go.
Cheapest flight found$594
Cheapest month to flyFebruary

Finding cheap flights from Washington D.C. to Cardiff: Frequently asked questions

The best price we found for a return flight from Washington D.C. to Cardiff is $1,372. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Washington D.C. to Cardiff. But we found flights with one stop from $1,372.
As of June 2026, there are no flights flying from Washington D.C. to Cardiff.
The cheapest month to fly from Washington D.C. to Cardiff is usually October.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Washington D.C. to Cardiff Airport on Monday, 12 October 2026.
No airlines currently offer direct flights between Washington D.C. and Cardiff Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Cardiff but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Cardiff is around 40 days in advance, so don’t leave your flight to the last minute.
The cheapest airline that flies to Cardiff is Icelandair .

Travelling from Washington DC to Cardiff Airport (CWL): What you need to know

  • The timezone in Cardiff is UTC+0, which is five hours ahead of Washington DC. Cardiff Airport is located in Cardiff.

  • Get to the airport on time so you don't miss your flight from Washington DC to CWL. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid any last-minute rush.

  • With more people on the move during busy months like July, be at your terminal even earlier. Two hours for domestic flights and up to four for international journeys will help you stay ahead of the crowds. Remember things also get busy during major holidays like Fourth of July.

Airports in Washington DC

Ronald Reagan Washington National Airport (DCA)

  • Located around 6 kilometres from the centre of Washington DC, DCA can be reached in about 10 minutes by car, depending on traffic. The journey by public transport takes roughly 25 minutes.

  • Looking for a comfortable hotel near Ronald Reagan Washington National Airport? If you're catching an early flight from Washington DC to Cardiff Airport, these stays will have you sleeping a quick hop from check-in:

  • Of all flights departing from Ronald Reagan Washington National Airport, 71% land on time at their destination.

  • DCA's address is 1 Aviation Circle.

Washington Dulles International Airport (IAD)

  • Add another location to your travels or just take a moment to reset with a stopover. If you'd like to break up your flight from Washington DC to Cardiff Airport, here's where you can stop when taking off from Washington Dulles International Airport:

    • Amsterdam Schiphol Airport (AMS)

    • Dublin Airport (DUB)

    • Edinburgh Airport (EDI)

  • You can reach IAD from central Washington DC in about 45 minutes by car, depending on traffic conditions. The journey by public transport takes roughly 1 hour 10 minutes to travel the 40 kilometres or so.

  • Want to enjoy an extra night away before your Washington DC to CWL flight? Relax in a hotel near Washington Dulles International Airport before your adventure officially starts. Here's where you can stay:

  • When it comes to flights staying on schedule, Washington Dulles International Airport has an on-time arrival performance of 77%.

  • The street address for IAD is 1 Saarinen Circle.

Baltimore Washington International Airport (BWI)

  • When booking your plane ticket from Washington DC to Cardiff Airport (CWL) out of Baltimore Washington International Airport (BWI), you have stopover options to choose from. Make a detour to Keflavik Airport (KEF), one of the most popular connection points on this route.

  • From the centre of Washington DC, BWI is around 48 kilometres away. It'll take you roughly 40 minutes to reach the airport by car and 50 minutes or so if you take public transport.

  • Wake up, take it easy and still make your Washington DC to Cardiff Airport flight with plenty of time to spare. These hotels near Baltimore Washington International Airport make getting to the terminal a breeze if you're setting off early:

  • Flights that take off from BWI arrive at their final stop within the expected time frame 77% of the time.

About Cardiff Airport (CWL)

  • The last thing you want is a long journey to your hotel if you're arriving on a late flight from Washington DC to Cardiff Airport. Stay at one of these accommodation options near CWL instead:

  • For the best deal, reserve your ride around four weeks in advance of your Washington DC to Cardiff Airport flight.

Getting from Cardiff Airport (CWL) to central Cardiff

  • From Cardiff Airport, central Cardiff is around 19 kilometres away. It takes about 25 minutes to get to the city centre by car.

  • Travelling on public transport takes roughly 40 minutes.

How to find the cheapest flights from Washington DC to Cardiff Airport (CWL)

  • The cheapest price we've found for a one-way ticket from Washington DC to Cardiff Airport is $594. For a return flight on this route, the best price is $1,372. Depending on when you book and the availability, these fares could change.

  • Booking ahead of time is often the key to finding a cheap flight from Washington DC to CWL. Prices tend to rise as demand increases, so the closer you get to departure, the more you'll likely spend.

  • If you have some flexibility with your travel dates, try using the 'Whole month' search tool. It'll show you the cheapest price in each month when searching for your Washington DC to Cardiff Airport ticket.

  • Save time searching for cheap plane tickets from Washington DC to CWL by setting up a Price Alert. We'll send you an email or notification on the app when a new discounted fare appears.

  • Filters make it easier to dig up a deal for your flight from Washington DC to Cardiff Airport. Choose the airlines, flight times and number of stops that make sense for you. Then sort the results by 'Cheapest' to bring up the lowest fares right away.

The best time to fly from Washington DC to Cardiff Airport (CWL)

  • It's time to work out when to book your flight from Washington DC to Cardiff Airport (CWL). June is the busiest month to travel to Cardiff. If crowds aren't your thing, think about going in December.

  • The warmest month in Cardiff is July, with temperatures ranging between 11ºC (52ºF) and 22ºC (72ºF). Book your Washington DC to CWL plane ticket then if this is the type of weather you enjoy.

  • If you want cooler conditions, look for a cheap ticket from Washington DC to Cardiff Airport in January when temperatures are between 0ºC (32ºF) and 9ºC (48ºF).

More about Cardiff

Explore more of the United Kingdom

  • London is just one of the many cities in the United Kingdom waiting to be explored after you've experienced Cardiff. Around 225 kilometres away to the east, popular attractions include The British Museum, Westminster Abbey and Big Ben.

  • Manchester is another favourite destination in the United Kingdom and is around 241 kilometres north of Cardiff. No trip is complete without a visit to Manchester United Museum & Stadium Tour, The Homes of Football and Museum of Science and Industry.

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.