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Cheap flights from Cardiff to Washington, D.C. from £580

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 5/9. 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
1 adult, Economy, 0 bags

Find the cheapest flights from Cardiff to Washington, D.C.

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
11:35 - 20:24
CWL
-
IAD
13h 49m
1 stop
Multiple Airlines Logo
20:30 - 22:50
IAD
-
CWL
21h 20m
2 stops
£580Multiple Airlines
Sat, 5 Sep - Mon, 21 Sep
Multiple Airlines Logo
11:35 - 10:18
CWL
-
DCA
27h 43m
2 stops
Multiple Airlines Logo
06:00 - 22:50
DCA
-
CWL
35h 50m
3 stops
£586Multiple Airlines
Sat, 5 Sep - Mon, 21 Sep
Multiple Airlines Logo
11:35 - 10:18
CWL
-
DCA
27h 43m
2 stops
Multiple Airlines Logo
11:00 - 22:50
DCA
-
CWL
30h 50m
2 stops
£594Multiple Airlines
Sat, 5 Sep - Mon, 21 Sep
Multiple Airlines Logo
07:30 - 15:45
CWL
-
IAD
13h 15m
1 stop
Multiple Airlines Logo
20:40 - 21:20
IAD
-
CWL
19h 40m
1 stop
£594Multiple Airlines
Sat, 12 Sep - Sat, 19 Sep
Multiple Airlines Logo
23:15 - 22:34
CWL
-
DCA
28h 19m
2 stops
Multiple Airlines Logo
09:40 - 23:25
DCA
-
CWL
32h 45m
3 stops
£595Multiple Airlines
Tue, 8 Sep - Tue, 15 Sep
Multiple Airlines Logo
11:35 - 20:24
CWL
-
IAD
13h 49m
1 stop
Multiple Airlines Logo
20:30 - 22:50
IAD
-
CWL
21h 20m
3 stops
£598Multiple Airlines
Sat, 5 Sep - Mon, 21 Sep
Multiple Airlines Logo
23:15 - 18:15
CWL
-
DCA
24h 00m
2 stops
Multiple Airlines Logo
18:55 - 23:25
DCA
-
CWL
23h 30m
2 stops
£601Multiple Airlines
Tue, 8 Sep - Tue, 15 Sep
Multiple Airlines Logo
11:35 - 18:12
CWL
-
DCA
11h 37m
1 stop
Multiple Airlines Logo
18:55 - 22:50
DCA
-
CWL
22h 55m
2 stops
£610Multiple Airlines
Sat, 5 Sep - Mon, 21 Sep
Air France Logo
17:35 - 15:35
CWL
-
IAD
27h 00m
1 stop
Air France Logo
18:10 - 16:45
IAD
-
CWL
17h 35m
1 stop
£628Air France
Sat, 5 Sep - Mon, 21 Sep
Multiple Airlines Logo
09:45 - 23:24
CWL
-
BWI
18h 39m
2 stops
Multiple Airlines Logo
13:55 - 09:15
BWI
-
CWL
14h 20m
2 stops
£632Multiple Airlines
Mon, 14 Sep - Mon, 21 Sep

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Air France flights from Cardiff to Washington, D.C.

Our best Air France deals on Cardiff to Washington, D.C. flight tickets
Air France
5 Sept
CWL17:35Cardiff Wales
27h 00m
1 stop
IAD15:35Washington, D.C. Dulles Intl
21 Sept
IAD18:10Washington, D.C. Dulles Intl
17h 35m
1 stop
CWL16:45Cardiff Wales
£628
Air France
12 Sept
CWL17:35Cardiff Wales
34h 26m
2 stops
BWI23:01Baltimore/Washington
19 Sept
BWI17:10Baltimore/Washington
18h 35m
2 stops
CWL16:45Cardiff Wales
£674
Air France
4 Oct
CWL09:50Cardiff Wales
10h 45m
1 stop
IAD15:35Washington, D.C. Dulles Intl
11 Oct
IAD17:40Washington, D.C. Dulles Intl
18h 05m
1 stop
CWL16:45Cardiff Wales
£679

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

Our best Virgin Atlantic deals on Cardiff to Washington, D.C. flight tickets
Virgin Atlantic
4 Oct
CWL09:50Cardiff Wales
53h 22m
2 stops
IAD10:12Washington, D.C. Dulles Intl
11 Oct
IAD18:32Washington, D.C. Dulles Intl
41h 13m
2 stops
CWL16:45Cardiff Wales
£643
Virgin Atlantic
8 Sept
CWL17:15Cardiff Wales
27h 20m
1 stop
IAD15:35Washington, D.C. Dulles Intl
15 Sept
IAD17:40Washington, D.C. Dulles Intl
18h 05m
1 stop
CWL16:45Cardiff Wales
£656
Virgin Atlantic
13 Sept
CWL09:50Cardiff Wales
42h 11m
2 stops
BWI23:01Baltimore/Washington
20 Sept
BWI17:40Baltimore/Washington
42h 05m
2 stops
CWL16:45Cardiff Wales
£660

momondo Fare Finder

 
Customise your flight search to find flights from Cardiff to Washington, D.C. 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 1 August 2026.
Use the filters below to find and compare flights from Cardiff to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sat 5/9

11:35-20:24

1 stop13h 49m

Washington, D.C. Dulles Intl

Mon 21/9

20:30-22:50

2 stops21h 20m

£580

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Sat 5/9

11:35-10:18

2 stops27h 43m

Washington, D.C. Reagan-National

Mon 21/9

06:00-22:50

3 stops35h 50m

£586

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Sat 5/9

11:35-10:18

2 stops27h 43m

Washington, D.C. Reagan-National

Mon 21/9

11:00-22:50

2 stops30h 50m

£594
Fastest return journey

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sat 12/9

07:30-15:45

1 stop13h 15m

Washington, D.C. Dulles Intl

Sat 19/9

20:40-21:20

1 stop19h 40m

£594

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Tue 8/9

23:15-22:34

2 stops28h 19m

Washington, D.C. Reagan-National

Tue 15/9

09:40-23:25

3 stops32h 45m

£595

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sat 5/9

11:35-20:24

1 stop13h 49m

Washington, D.C. Dulles Intl

Mon 21/9

20:30-22:50

3 stops21h 20m

£598

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Tue 8/9

23:15-18:15

2 stops24h 00m

Washington, D.C. Reagan-National

Tue 15/9

18:55-23:25

2 stops23h 30m

£601

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Sat 5/9

11:35-18:12

1 stop11h 37m

Washington, D.C. Reagan-National

Mon 21/9

18:55-22:50

2 stops22h 55m

£610

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sat 5/9

17:35-15:35

1 stop27h 00m

Washington, D.C. Dulles Intl

Mon 21/9

18:10-16:45

1 stop17h 35m

£628

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Mon 14/9

09:45-23:24

2 stops18h 39m

Baltimore/Washington

Mon 21/9

13:55-09:15

2 stops14h 20m

£632

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington, D.C. from

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

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

Can stopping save me money on Cardiff to Washington, D.C. flights?

You could potentially save up to 61% on your flight if you consider stops on a Cardiff to Washington, D.C. flight.

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

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

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

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

Fastest flight time

13h 49m

Direct flights

None
The fastest flight from Cardiff to Washington, D.C. takes 13h 49m
There are no direct flights from Cardiff to Washington, D.C.. There are no popular flight routes from Cardiff to Washington, D.C..
Search flight deals

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

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

    There are 3537.5 mi between Cardiff Wales and Washington, D.C.. 13h 49m is a normal flight duration for this route.

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

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

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

    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 Cardiff Wales Airport to Washington, D.C..

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

    The required travel and health documents for your Washington, D.C. trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C.. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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

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

Why use momondo?

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

Finding the right flight to Washington, D.C. from Cardiff 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 Washington, D.C. quick and easy, saving you time and money.

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

Yes. momondo enables you to select and highlight flights to Washington, D.C. from Cardiff with this policy.

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

momondo helps you find the best flight between Cardiff and Washington, D.C. by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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 can track prices for Cardiff to Washington, D.C. flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Find better results for your trip to the United States

Fly into one of these airports located in Washington, D.C.

Airports listed have a maximum distance of 22.4 mi from Washington, D.C.
Washington, D.C. Reagan-National Airport
Washington, D.C. Dulles Intl Airport