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Cheap flights from Washington, D.C. to Cardiff from £324

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 16/9. 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 Washington, D.C. to Cardiff

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
06:00 - 10:15
DCA
-
CWL
23h 15m
2 stops
Multiple Airlines Logo
11:35 - 19:57
CWL
-
DCA
13h 22m
1 stop
£643Multiple Airlines
Mon, 15 Jun - Thu, 18 Jun
Multiple Airlines Logo
20:55 - 21:45
IAD
-
CWL
19h 50m
1 stop
Multiple Airlines Logo
07:30 - 10:46
CWL
-
IAD
32h 16m
2 stops
£664Multiple Airlines
Sun, 13 Sep - Sat, 26 Sep
Multiple Airlines Logo
06:00 - 10:15
DCA
-
CWL
23h 15m
2 stops
Multiple Airlines Logo
11:35 - 21:48
CWL
-
DCA
15h 13m
2 stops
£667Multiple Airlines
Mon, 15 Jun - Thu, 18 Jun
Multiple Airlines Logo
17:47 - 10:15
IAD
-
CWL
35h 28m
2 stops
Multiple Airlines Logo
11:35 - 10:46
CWL
-
IAD
28h 11m
1 stop
£673Multiple Airlines
Tue, 16 Jun - Tue, 23 Jun
Multiple Airlines Logo
06:00 - 22:50
DCA
-
CWL
35h 50m
3 stops
Multiple Airlines Logo
22:50 - 12:00
CWL
-
DCA
42h 10m
3 stops
£675Multiple Airlines
Mon, 15 Jun - Thu, 18 Jun
Multiple Airlines Logo
06:00 - 10:15
DCA
-
CWL
23h 15m
2 stops
Multiple Airlines Logo
22:50 - 12:00
CWL
-
DCA
42h 10m
3 stops
£683Multiple Airlines
Mon, 15 Jun - Thu, 18 Jun
Delta Logo
13:00 - 09:15
BWI
-
CWL
15h 15m
2 stops
Delta Logo
09:45 - 22:13
CWL
-
BWI
17h 28m
2 stops
£834Delta
Mon, 14 Sep - Thu, 24 Sep
Delta Logo
10:00 - 09:15
BWI
-
CWL
18h 15m
2 stops
Delta Logo
09:45 - 22:13
CWL
-
BWI
17h 28m
2 stops
£870Delta
Sat, 12 Sep - Thu, 24 Sep
Delta Logo
10:40 - 09:15
BWI
-
CWL
17h 35m
2 stops
Delta Logo
09:45 - 21:13
CWL
-
BWI
16h 28m
2 stops
£917Delta
Sun, 23 Aug - Wed, 26 Aug
KLM Logo
13:00 - 09:15
BWI
-
CWL
15h 15m
2 stops
KLM Logo
09:45 - 20:51
CWL
-
BWI
16h 06m
2 stops
£1,009KLM
Mon, 31 Aug - Wed, 9 Sep

Delta flights from Washington, D.C. to Cardiff

Our best Delta deals on Washington, D.C. to Cardiff flight tickets
Delta
13 Sept
DCA11:00Washington, D.C. Reagan-National
17h 15m
2 stops
CWL09:15Cardiff Wales
25 Sept
CWL09:45Cardiff Wales
17h 36m
2 stops
DCA22:21Washington, D.C. Reagan-National
£833
Delta
14 Sept
DCA11:00Washington, D.C. Reagan-National
17h 15m
2 stops
CWL09:15Cardiff Wales
25 Sept
CWL09:45Cardiff Wales
18h 39m
2 stops
DCA23:24Washington, D.C. Reagan-National
£834
Delta
12 Sept
BWI10:00Baltimore/Washington
18h 15m
2 stops
CWL09:15Cardiff Wales
24 Sept
CWL09:45Cardiff Wales
17h 28m
2 stops
BWI22:13Baltimore/Washington
£870

KLM flights from Washington, D.C. to Cardiff

Our best KLM deals on Washington, D.C. to Cardiff flight tickets
KLM
31 Aug
DCA13:45Washington, D.C. Reagan-National
14h 30m
2 stops
CWL09:15Cardiff Wales
9 Sept
CWL09:45Cardiff Wales
17h 05m
2 stops
DCA21:50Washington, D.C. Reagan-National
£857
KLM
31 Aug
DCA13:30Washington, D.C. Reagan-National
14h 45m
2 stops
CWL09:15Cardiff Wales
9 Sept
CWL09:45Cardiff Wales
17h 05m
2 stops
DCA21:50Washington, D.C. Reagan-National
£858
KLM
11 Sept
DCA15:30Washington, D.C. Reagan-National
12h 45m
2 stops
CWL09:15Cardiff Wales
25 Sept
CWL09:45Cardiff Wales
15h 34m
2 stops
DCA20:19Washington, D.C. Reagan-National
£915

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 13 May 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

DCA - CWL

DCACWL

Washington, D.C. Reagan-National

Mon 15/6

06:00-10:15

2 stops23h 15m

Cardiff Wales

Thu 18/6

11:35-19:57

1 stop13h 22m

£643

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 13/9

20:55-21:45

1 stop19h 50m

Cardiff Wales

Sat 26/9

07:30-10:46

2 stops32h 16m

£664

Washington, D.C.Cardiff

DCA - CWL

DCACWL

Washington, D.C. Reagan-National

Mon 15/6

06:00-10:15

2 stops23h 15m

Cardiff Wales

Thu 18/6

11:35-21:48

2 stops15h 13m

£667

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Tue 16/6

17:47-10:15

2 stops35h 28m

Cardiff Wales

Tue 23/6

11:35-10:46

1 stop28h 11m

£673

Washington, D.C.Cardiff

DCA - CWL

DCACWL

Washington, D.C. Reagan-National

Mon 15/6

06:00-22:50

3 stops35h 50m

Cardiff Wales

Thu 18/6

22:50-12:00

3 stops42h 10m

£675

Washington, D.C.Cardiff

DCA - CWL

DCACWL

Washington, D.C. Reagan-National

Mon 15/6

06:00-10:15

2 stops23h 15m

Cardiff Wales

Thu 18/6

22:50-12:00

3 stops42h 10m

£683

BaltimoreCardiff

BWI - CWL

BWICWL

Baltimore/Washington

Mon 14/9

13:00-09:15

2 stops15h 15m

Cardiff Wales

Thu 24/9

09:45-22:13

2 stops17h 28m

£834

BaltimoreCardiff

BWI - CWL

BWICWL

Baltimore/Washington

Sat 12/9

10:00-09:15

2 stops18h 15m

Cardiff Wales

Thu 24/9

09:45-22:13

2 stops17h 28m

£870

BaltimoreCardiff

BWI - CWL

BWICWL

Baltimore/Washington

Sun 23/8

10:40-09:15

2 stops17h 35m

Cardiff Wales

Wed 26/8

09:45-21:13

2 stops16h 28m

£917
Fastest return journey

BaltimoreCardiff

BWI - CWL

BWICWL

Baltimore/Washington

Mon 31/8

13:00-09:15

2 stops15h 15m

Cardiff Wales

Wed 9/9

09:45-20:51

2 stops16h 06m

£1,009

Flights are sorted by cheapest return flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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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?

Delta 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

10h 05m

Direct flights

None
The fastest flight from Washington, D.C. to Cardiff takes 10h 05m
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 10h 05m, 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

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
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Find better results for your trip to the United Kingdom

Airports servicing Wales

Holyhead Anglesey Airport