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Cheap flights from Washington, D.C. to Cardiff from £260

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 3/5. 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
20:30 - 23:05
BWI
-
CWL
21h 35m
2 stops
Multiple Airlines Logo
23:15 - 19:25
CWL
-
BWI
25h 10m
2 stops
£667Multiple Airlines
Tue, 5 May - Tue, 12 May
Multiple Airlines Logo
20:30 - 22:50
BWI
-
CWL
21h 20m
2 stops
Multiple Airlines Logo
17:15 - 22:15
CWL
-
BWI
34h 00m
3 stops
£678Multiple Airlines
Mon, 4 May - Mon, 11 May
Multiple Airlines Logo
17:15 - 23:25
IAD
-
CWL
25h 10m
1 stop
Multiple Airlines Logo
23:15 - 10:54
CWL
-
IAD
40h 39m
2 stops
£679Multiple Airlines
Tue, 21 Apr - Tue, 28 Apr
Multiple Airlines Logo
18:55 - 23:05
DCA
-
CWL
23h 10m
2 stops
Multiple Airlines Logo
23:15 - 19:58
CWL
-
DCA
25h 43m
2 stops
£715Multiple Airlines
Tue, 5 May - Tue, 12 May
Multiple Airlines Logo
11:00 - 10:15
DCA
-
CWL
18h 15m
1 stop
Multiple Airlines Logo
11:35 - 21:48
CWL
-
DCA
15h 13m
2 stops
£717Multiple Airlines
Wed, 1 Jul - Sat, 11 Jul
Virgin Atlantic Logo
17:40 - 16:45
IAD
-
CWL
18h 05m
1 stop
Virgin Atlantic Logo
09:45 - 15:35
CWL
-
IAD
10h 50m
1 stop
£806Virgin Atlantic
Tue, 21 Apr - Tue, 28 Apr
KLM Logo
14:18 - 09:15
BWI
-
CWL
13h 57m
2 stops
KLM Logo
09:45 - 20:17
CWL
-
BWI
15h 32m
2 stops
£816KLM
Tue, 21 Apr - Tue, 28 Apr
KLM Logo
13:40 - 09:15
DCA
-
CWL
14h 35m
2 stops
KLM Logo
09:45 - 20:33
CWL
-
DCA
15h 48m
2 stops
£816KLM
Tue, 21 Apr - Tue, 28 Apr
Virgin Atlantic Logo
17:33 - 09:15
BWI
-
CWL
34h 42m
2 stops
Virgin Atlantic Logo
09:45 - 23:17
CWL
-
BWI
42h 32m
2 stops
£834Virgin Atlantic
Mon, 4 May - Mon, 11 May
Delta Logo
10:00 - 09:15
DCA
-
CWL
18h 15m
2 stops
Delta Logo
09:45 - 22:03
CWL
-
DCA
17h 18m
2 stops
£853Delta
Fri, 8 May - Fri, 15 May

Virgin Atlantic flights from Washington, D.C. to Cardiff

Our best Virgin Atlantic deals on Washington, D.C. to Cardiff flight tickets
Virgin Atlantic
21 Apr
IAD17:40Washington, D.C. Dulles Intl
18h 05m
1 stop
CWL16:45Cardiff Wales
28 Apr
CWL09:45Cardiff Wales
10h 50m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£806
Virgin Atlantic
5 May
IAD17:40Washington, D.C. Dulles Intl
10h 35m
1 stop
CWL09:15Cardiff Wales
12 May
CWL17:15Cardiff Wales
27h 20m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£826
Virgin Atlantic
4 May
BWI17:33Baltimore/Washington
34h 42m
2 stops
CWL09:15Cardiff Wales
11 May
CWL09:45Cardiff Wales
42h 32m
2 stops
BWI23:17Baltimore/Washington
£834

KLM flights from Washington, D.C. to Cardiff

Our best KLM deals on Washington, D.C. to Cardiff flight tickets
KLM
21 Apr
BWI14:18Baltimore/Washington
13h 57m
2 stops
CWL09:15Cardiff Wales
28 Apr
CWL09:45Cardiff Wales
15h 32m
2 stops
BWI20:17Baltimore/Washington
£816
KLM
5 May
DCA15:15Washington, D.C. Reagan-National
13h 00m
2 stops
CWL09:15Cardiff Wales
12 May
CWL09:45Cardiff Wales
17h 18m
2 stops
DCA22:03Washington, D.C. Reagan-National
£847
KLM
6 May
BWI15:33Baltimore/Washington
12h 42m
2 stops
CWL09:15Cardiff Wales
13 May
CWL09:45Cardiff Wales
16h 02m
2 stops
BWI20:47Baltimore/Washington
£850

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 24 March 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

BaltimoreCardiff

BWI - CWL

BWICWL

Baltimore/Washington

Tue 5/5

20:30-23:05

2 stops21h 35m

Cardiff Wales

Tue 12/5

23:15-19:25

2 stops25h 10m

£667

BaltimoreCardiff

BWI - CWL

BWICWL

Baltimore/Washington

Mon 4/5

20:30-22:50

2 stops21h 20m

Cardiff Wales

Mon 11/5

17:15-22:15

3 stops34h 00m

£678

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Tue 21/4

17:15-23:25

1 stop25h 10m

Cardiff Wales

Tue 28/4

23:15-10:54

2 stops40h 39m

£679

Washington, D.C.Cardiff

DCA - CWL

DCACWL

Washington, D.C. Reagan-National

Tue 5/5

18:55-23:05

2 stops23h 10m

Cardiff Wales

Tue 12/5

23:15-19:58

2 stops25h 43m

£715

Washington, D.C.Cardiff

DCA - CWL

DCACWL

Washington, D.C. Reagan-National

Wed 1/7

11:00-10:15

1 stop18h 15m

Cardiff Wales

Sat 11/7

11:35-21:48

2 stops15h 13m

£717
Fastest return journey

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Tue 21/4

17:40-16:45

1 stop18h 05m

Cardiff Wales

Tue 28/4

09:45-15:35

1 stop10h 50m

£806

BaltimoreCardiff

BWI - CWL

BWICWL

Baltimore/Washington

Tue 21/4

14:18-09:15

2 stops13h 57m

Cardiff Wales

Tue 28/4

09:45-20:17

2 stops15h 32m

£816

Washington, D.C.Cardiff

DCA - CWL

DCACWL

Washington, D.C. Reagan-National

Tue 21/4

13:40-09:15

2 stops14h 35m

Cardiff Wales

Tue 28/4

09:45-20:33

2 stops15h 48m

£816

BaltimoreCardiff

BWI - CWL

BWICWL

Baltimore/Washington

Mon 4/5

17:33-09:15

2 stops34h 42m

Cardiff Wales

Mon 11/5

09:45-23:17

2 stops42h 32m

£834

Washington, D.C.Cardiff

DCA - CWL

DCACWL

Washington, D.C. Reagan-National

Fri 8/5

10:00-09:15

2 stops18h 15m

Cardiff Wales

Fri 15/5

09:45-22:03

2 stops17h 18m

£853

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 and Aer Lingus are the most popular carriers 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 45m

Direct flights

None
The fastest flight from Washington, D.C. to Cardiff takes 10h 45m
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

  • 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 45m, 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