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Cheap flights from Cardiff to Washington, D.C. from £721

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from Cardiff to Washington, D.C. departing on 1/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags
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Find the cheapest flights from Cardiff to Washington, D.C.

Cheap return flights

Enter your travel dates to find the best prices.
KLM Logo
17:30 - 16:27
CWL
-
DCA
27h 57m
2 stops
KLM Logo
20:45 - 09:50
DCA
-
CWL
33h 05m
2 stops
£721KLM
Sun, 1 Mar - Sun, 8 Mar
Multiple Airlines Logo
21:20 - 19:45
CWL
-
DCA
27h 25m
3 stops
Multiple Airlines Logo
18:50 - 23:05
DCA
-
CWL
24h 15m
3 stops
£1,042Multiple Airlines
Sun, 1 Mar - Sun, 8 Mar
Multiple Airlines Logo
17:30 - 22:35
CWL
-
DCA
34h 05m
3 stops
Multiple Airlines Logo
15:00 - 09:50
DCA
-
CWL
14h 50m
2 stops
£1,073Multiple Airlines
Sun, 1 Mar - Sun, 8 Mar

momondo Fare Finder

 
Customise your flight search to find flights from Cardiff to Washington, D.C. Reagan-National Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 279,928 searches. Data last updated 2 February 2026.
Use the filters below to find and compare flights from Cardiff to Washington, D.C. Reagan-National Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Sun 1/3

17:30-16:27

2 stops27h 57m

Washington, D.C. Reagan-National

Sun 8/3

20:45-09:50

2 stops33h 05m

£721

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Sun 1/3

21:20-19:45

3 stops27h 25m

Washington, D.C. Reagan-National

Sun 8/3

18:50-23:05

3 stops24h 15m

£1,042

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Sun 1/3

17:30-22:35

3 stops34h 05m

Washington, D.C. Reagan-National

Sun 8/3

15:00-09:50

2 stops14h 50m

£1,073

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

When to book flights from Cardiff to Washington, D.C. Reagan-National Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Cardiff to Washington, D.C. Reagan-National Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Cardiff to Washington, D.C. Reagan-National Airport (CWL to DCA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Cardiff to Washington, D.C. Reagan-National Airport

Fastest flight time

28h 00m

Direct flights

None
The fastest flight from Cardiff to Washington, D.C. Reagan-National Airport takes 28h 00m
There are no direct flights from Cardiff to Washington, D.C. Reagan-National Airport. There are no popular flight routes from Cardiff to Washington, D.C. Reagan-National Airport.
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  • How far is Cardiff Wales to Washington, D.C. Reagan-National by plane?

    A flight from Cardiff Wales to Washington, D.C. Reagan-National will travel around 3539.9 mi. A reasonable flight in good conditions will take 28h 00m.

  • When did momondo last update prices for flights from Cardiff Wales Airport to Washington, D.C. Reagan-National Airport?

    Prices for flights from Cardiff Wales Airport to Washington, D.C. Reagan-National Airport are updated daily.

  • How old do you have to be to fly from Cardiff Wales Airport to Washington, D.C. Reagan-National Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Cardiff Wales Airport to Washington, D.C. Reagan-National Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Reagan-National Airport?

    The travel and health documents required for your trip to Washington, D.C. Reagan-National Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington, D.C. Reagan-National Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • How do I get Price Alerts for flights from Cardiff to Washington, D.C. Reagan-National Airport?

    You can take advantage of momondo’s Price Alerts by first searching for your flights to Cardiff from Washington, D.C. Reagan-National Airport. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

  • How can I save money on flights from Cardiff to Washington, D.C. Reagan-National Airport with momondo?

    By using tools like our “Price Calendar”, you can see the best days for return flights on your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

  • How does momondo find its flight prices?

    We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

Travelling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Laurel
College Park
Fairfax
Arlington
Linthicum Heights
Alexandria
Glen Burnie
Lutherville Timonium
Ellicott City
Cambridge
Lexington Park
Westminster
Woodbridge
Bethesda
Rockville
Silver Spring
Owings Mills
Landover
National Harbor

Why use momondo?

Why should I use momondo to find a flight deal from Cardiff to Washington, D.C.?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Cardiff to Washington, D.C. . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Cardiff to Washington, D.C. with flexible booking policies on momondo?

momondo does allow users to show only those flights to Washington, D.C. from Cardiff which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Cardiff to Washington, D.C.?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Cardiff to Washington, D.C..

I’m not ready to book a flight from Cardiff to Washington, D.C. right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Washington, D.C. from Cardiff. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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