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Cheap flights from Cardiff to Washington, D.C. from £493

This is the cheapest one-way 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 4/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
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Find the cheapest flights from Cardiff to Washington, D.C.

Cheap return flights

KLM Logo
09:45 - 23:41CWL-DCA
18h 56m2 stops
KLM Logo
14:00 - 09:15DCA-CWL
14h 15m2 stops
£671KLM
Find Deal
Sat, 27 Sep - Sat, 4 Oct
Logo
09:00 - 18:04CWL-DCA
14h 04m2 stops
Logo
12:55 - 10:35DCA-CWL
16h 40m3 stops
£701
Find Deal
Sat, 27 Sep - Sat, 4 Oct

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

Our best KLM deals on Cardiff to Washington, D.C. Reagan-National Airport flight tickets
KLM
27 Sept
CWL09:45Cardiff Wales
18h 56m
2 stops
DCA23:41Washington, D.C. Reagan-National
4 Oct
DCA14:00Washington, D.C. Reagan-National
14h 15m
2 stops
CWL09:15Cardiff Wales
£671
Find similar
KLM
18 Aug
CWL09:50Cardiff Wales
15h 57m
2 stops
DCA20:47Washington, D.C. Reagan-National
25 Aug
DCA13:55Washington, D.C. Reagan-National
14h 20m
2 stops
CWL09:15Cardiff Wales
£1,364
Find similar

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 15 August 2025.
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

Sat 27/9

09:45-23:41

2 stops18h 56m

Washington, D.C. Reagan-National

Sat 4/10

14:00-09:15

2 stops14h 15m

£671

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Sat 27/9

09:00-18:04

2 stops14h 04m

Washington, D.C. Reagan-National

Sat 4/10

12:55-10:35

3 stops16h 40m

£701

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Sat 4/10

09:00-22:34

3 stops18h 34m

£493

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Sat 4/10

09:00-22:34

2 stops18h 34m

£516

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

Best price found

£493

Fastest flight time

14h 04m

Direct flights

None
The best one-way flight to Washington, D.C. Reagan-National Airport from Cardiff in the past 72 hours is £493. The best return flight deal from Cardiff to Washington, D.C. Reagan-National Airport found on momondo in the last 72 hours is £671.
The fastest flight from Cardiff to Washington, D.C. Reagan-National Airport takes 14h 04m
There are no direct flights from Cardiff to Washington, D.C. Reagan-National Airport. Popular non-direct route for this connection is Cardiff Wales Airport - 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 14h 04m.

  • 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
Essex
Alexandria
Fairfax
Manassas
Bethesda
Oxon Hill
College Park
Linthicum Heights
Gettysburg
Hanover
Cambridge
Ellicott City
Westminster
Arlington
Woodbridge
Owings Mills
Silver Spring
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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