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Cheap flights from Washington, D.C. to Cardiff from £257

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to Cardiff departing on 8/8. 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
1 adult, Economy, 0 bags
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Find the cheapest flights from Washington, D.C. to Cardiff

Cheap return flights

Enter your travel dates to find the best prices.
Virgin Atlantic Logo
17:40 - 17:05
IAD
-
CWL
18h 25m
1 stop
Virgin Atlantic Logo
09:45 - 15:35
CWL
-
IAD
10h 50m
1 stop
£466Virgin Atlantic
Fri, 14 Aug - Mon, 24 Aug
Virgin Atlantic Logo
08:28 - 09:15
IAD
-
CWL
19h 47m
2 stops
Virgin Atlantic Logo
09:45 - 15:35
CWL
-
IAD
10h 50m
1 stop
£488Virgin Atlantic
Fri, 14 Aug - Mon, 24 Aug
Virgin Atlantic Logo
08:28 - 09:15
IAD
-
CWL
19h 47m
2 stops
Virgin Atlantic Logo
09:45 - 20:55
CWL
-
IAD
16h 10m
2 stops
£512Virgin Atlantic
Fri, 14 Aug - Mon, 24 Aug
Multiple Airlines Logo
06:00 - 22:50
DCA
-
CWL
35h 50m
3 stops
Multiple Airlines Logo
22:10 - 10:18
CWL
-
DCA
41h 08m
3 stops
£642Multiple Airlines
Mon, 10 Aug - Mon, 17 Aug
Multiple Airlines Logo
18:55 - 22:50
DCA
-
CWL
22h 55m
2 stops
Multiple Airlines Logo
22:10 - 10:18
CWL
-
DCA
41h 08m
3 stops
£650Multiple Airlines
Mon, 10 Aug - Mon, 17 Aug
Multiple Airlines Logo
18:55 - 22:50
DCA
-
CWL
22h 55m
2 stops
Multiple Airlines Logo
22:10 - 22:31
CWL
-
DCA
29h 21m
2 stops
£685Multiple Airlines
Mon, 10 Aug - Mon, 17 Aug
KLM Logo
15:15 - 09:15
DCA
-
CWL
13h 00m
2 stops
KLM Logo
09:45 - 20:35
CWL
-
DCA
15h 50m
2 stops
£878KLM
Mon, 31 Aug - Wed, 9 Sep
Delta Logo
10:40 - 09:15
BWI
-
CWL
17h 35m
2 stops
Delta Logo
09:45 - 21:22
CWL
-
BWI
16h 37m
2 stops
£891Delta
Mon, 31 Aug - Wed, 9 Sep
Delta Logo
12:00 - 09:15
DCA
-
CWL
16h 15m
2 stops
Delta Logo
09:45 - 20:35
CWL
-
DCA
15h 50m
2 stops
£891Delta
Mon, 31 Aug - Wed, 9 Sep
WestJet Logo
10:25 - 10:15
BWI
-
CWL
18h 50m
2 stops
WestJet Logo
11:35 - 10:57
CWL
-
BWI
28h 22m
2 stops
£1,089WestJet
Fri, 14 Aug - Mon, 24 Aug

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Delta flights from Washington, D.C. to Cardiff

Our best Delta deals on Washington, D.C. to Cardiff flight tickets
Delta
31 Aug
IAD10:16Washington, D.C. Dulles Intl
17h 59m
2 stops
CWL09:15Cardiff Wales
9 Sept
CWL09:45Cardiff Wales
10h 50m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£884
Delta
31 Aug
BWI10:40Baltimore/Washington
17h 35m
2 stops
CWL09:15Cardiff Wales
9 Sept
CWL09:45Cardiff Wales
16h 37m
2 stops
BWI21:22Baltimore/Washington
£891
Delta
31 Aug
BWI10:40Baltimore/Washington
17h 35m
2 stops
CWL09:15Cardiff Wales
9 Sept
CWL09:45Cardiff Wales
16h 45m
2 stops
BWI21:30Baltimore/Washington
£891

KLM flights from Washington, D.C. to Cardiff

Our best KLM deals on Washington, D.C. to Cardiff flight tickets
KLM
31 Aug
IAD18:10Washington, D.C. Dulles Intl
17h 35m
1 stop
CWL16:45Cardiff Wales
9 Sept
CWL09:45Cardiff Wales
10h 50m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£867
KLM
31 Aug
IAD18:10Washington, D.C. Dulles Intl
17h 35m
1 stop
CWL16:45Cardiff Wales
9 Sept
CWL09:45Cardiff Wales
15h 30m
2 stops
IAD20:15Washington, D.C. Dulles Intl
£875
KLM
31 Aug
DCA15:15Washington, D.C. Reagan-National
13h 00m
2 stops
CWL09:15Cardiff Wales
9 Sept
CWL09:45Cardiff Wales
15h 50m
2 stops
DCA20:35Washington, D.C. Reagan-National
£878

momondo Fare Finder

 
Customise your flight search to find flights from Washington, D.C. to Cardiff 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 27 June 2026.
Use the filters below to find and compare flights from Washington, D.C. to Cardiff that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 14/8

17:40-17:05

1 stop18h 25m

Cardiff Wales

Mon 24/8

09:45-15:35

1 stop10h 50m

£466

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 14/8

08:28-09:15

2 stops19h 47m

Cardiff Wales

Mon 24/8

09:45-15:35

1 stop10h 50m

£488

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 14/8

08:28-09:15

2 stops19h 47m

Cardiff Wales

Mon 24/8

09:45-20:55

2 stops16h 10m

£512

Washington, D.C.Cardiff

DCA - CWL

DCACWL

Washington, D.C. Reagan-National

Mon 10/8

06:00-22:50

3 stops35h 50m

Cardiff Wales

Mon 17/8

22:10-10:18

3 stops41h 08m

£642

Washington, D.C.Cardiff

DCA - CWL

DCACWL

Washington, D.C. Reagan-National

Mon 10/8

18:55-22:50

2 stops22h 55m

Cardiff Wales

Mon 17/8

22:10-10:18

3 stops41h 08m

£650

Washington, D.C.Cardiff

DCA - CWL

DCACWL

Washington, D.C. Reagan-National

Mon 10/8

18:55-22:50

2 stops22h 55m

Cardiff Wales

Mon 17/8

22:10-22:31

2 stops29h 21m

£685
Fastest return journey

Washington, D.C.Cardiff

DCA - CWL

DCACWL

Washington, D.C. Reagan-National

Mon 31/8

15:15-09:15

2 stops13h 00m

Cardiff Wales

Wed 9/9

09:45-20:35

2 stops15h 50m

£878

BaltimoreCardiff

BWI - CWL

BWICWL

Baltimore/Washington

Mon 31/8

10:40-09:15

2 stops17h 35m

Cardiff Wales

Wed 9/9

09:45-21:22

2 stops16h 37m

£891

Washington, D.C.Cardiff

DCA - CWL

DCACWL

Washington, D.C. Reagan-National

Mon 31/8

12:00-09:15

2 stops16h 15m

Cardiff Wales

Wed 9/9

09:45-20:35

2 stops15h 50m

£891

BaltimoreCardiff

BWI - CWL

BWICWL

Baltimore/Washington

Fri 14/8

10:25-10:15

2 stops18h 50m

Cardiff Wales

Mon 24/8

11:35-10:57

2 stops28h 22m

£1,089

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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See travel insights to Cardiff from

How to get the cheapest flight ticket from Washington, D.C. to Cardiff

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Washington, D.C. to Cardiff Wales?

KLM is the most popular carrier operating from Washington, D.C. to Cardiff Wales

When to book flights from Washington, D.C. to Cardiff

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

Cheap Washington, D.C. to Cardiff (WAS to CWL) flight deals and tips

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

Fastest flight time

13h 15m

Direct flights

None
The fastest flight from Washington, D.C. to Cardiff takes 13h 15m
There are no direct flights from Washington, D.C. to Cardiff. There are no popular flight routes from Washington, D.C. to Cardiff.
Search flight deals

Frequently asked questions about flying from Washington, D.C. to Cardiff

  • How far is Washington, D.C. to Cardiff Wales by plane?

    Washington, D.C. and Cardiff Wales are 3537.5 mi apart from one another. Flights usually cover this in 13h 15m, depending on flying conditions and air traffic around both airports.

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

    Prices for flights from Washington, D.C. to Cardiff Wales Airport refresh daily.

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. to Cardiff Wales Airport.

  • What documentation or ID do you need to fly to Cardiff Wales Airport?

    The necessary travel and health documents for your Cardiff Wales Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Travelling to a place near Cardiff?

Book flights to Cardiff if you plan to visit one of these locations
Barry
Bridgend

Why use momondo?

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

Finding the right flight to Cardiff from Washington, D.C. is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Cardiff quick and easy, saving you time and money.

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

Yes. All flights to Cardiff from Washington, D.C. on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

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 Washington, D.C. to Cardiff.

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

If you are simply researching potential flights to Cardiff, momondo offers a useful price alert feature which will track prices for flights to Cardiff from Washington, D.C. and alert you when they change.

An easier way to manage your Cardiff trip

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Find better results for your trip to the United Kingdom

Airports servicing Wales

Holyhead Anglesey Airport