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Cheap flights from Washington, D.C. to Cardiff from £230

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 29/9. 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 Washington, D.C. to Cardiff

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
20:40 - 21:45DCA  Washington, D.C. Reagan-National-CWL Cardiff Wales
20h 05m2 stops Toronto Pearson Intl Dublin
Multiple Airlines Logo
22:10 - 22:34CWL  Cardiff Wales-DCA Washington, D.C. Reagan-National
29h 24m3 stops Dublin St John's Toronto Pearson Intl
£615Multiple Airlines
Sun, 4 Oct - Mon, 19 Oct
Multiple Airlines Logo
17:15 - 23:25IAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
25h 10m1 stop Dublin
Multiple Airlines Logo
21:45 - 15:30CWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
22h 45m2 stops Alicante Madrid Barajas
£643Multiple Airlines
Tue, 29 Sep - Tue, 6 Oct
Multiple Airlines Logo
20:40 - 16:45DCA  Washington, D.C. Reagan-National-CWL Cardiff Wales
39h 05m3 stops Toronto Pearson Intl Dublin Amsterdam Schiphol
Multiple Airlines Logo
22:10 - 22:34CWL  Cardiff Wales-DCA Washington, D.C. Reagan-National
29h 24m3 stops Dublin St John's Toronto Pearson Intl
£646Multiple Airlines
Sun, 4 Oct - Mon, 19 Oct
Multiple Airlines Logo
16:00 - 23:25IAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
26h 25m2 stops Toronto Pearson Intl Dublin
Multiple Airlines Logo
21:45 - 19:00CWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
26h 15m2 stops Alicante Casablanca Mohamed V
£656Multiple Airlines
Tue, 29 Sep - Tue, 6 Oct
Multiple Airlines Logo
15:45 - 21:45IAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
25h 00m3 stops Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl Dublin
Multiple Airlines Logo
22:10 - 21:24CWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
28h 14m3 stops Dublin St John's Toronto Pearson Intl
£661Multiple Airlines
Sun, 4 Oct - Mon, 19 Oct
Multiple Airlines Logo
12:43 - 21:45IAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
28h 02m2 stops Toronto Pearson Intl Dublin
Multiple Airlines Logo
13:35 - 19:35CWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
35h 00m2 stops Malaga Dublin
£695Multiple Airlines
Sun, 4 Oct - Mon, 19 Oct
Multiple Airlines Logo
20:55 - 22:50IAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
20h 55m1 stop Dublin
Multiple Airlines Logo
22:45 - 15:10CWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
21h 25m2 stops Dublin Lisbon Humberto Delgado
£706Multiple Airlines
Mon, 5 Oct - Fri, 9 Oct
Multiple Airlines Logo
20:55 - 22:50IAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
20h 55m1 stop Dublin
Multiple Airlines Logo
07:45 - 15:45CWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
13h 00m1 stop Dublin
£718Multiple Airlines
Mon, 5 Oct - Fri, 9 Oct
Multiple Airlines Logo
09:55 - 23:25IAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
32h 30m3 stops Toronto Pearson Intl Reykjavik Keflavik Intl Dublin
Multiple Airlines Logo
21:45 - 19:00CWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
26h 15m2 stops Alicante Casablanca Mohamed V
£737Multiple Airlines
Tue, 29 Sep - Tue, 6 Oct
Multiple Airlines Logo
15:45 - 22:50IAD  Washington, D.C. Dulles Intl-CWL Cardiff Wales
26h 05m3 stops Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl Dublin
Multiple Airlines Logo
10:25 - 15:10CWL  Cardiff Wales-IAD Washington, D.C. Dulles Intl
33h 45m2 stops Alicante Lisbon Humberto Delgado
£744Multiple Airlines
Mon, 14 Sep - Mon, 21 Sep

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

Our best Virgin Atlantic deals on Washington, D.C. to Cardiff flight tickets
Virgin Atlantic
16 Nov
IAD18:15Washington, D.C. Dulles Intl
17h 45m
1 stop
CWL17:00Cardiff Wales
26 Nov
CWL17:30Cardiff Wales
27h 25m
1 stop
IAD15:55Washington, D.C. Dulles Intl
£824
Virgin Atlantic
4 Oct
IAD17:30Washington, D.C. Dulles Intl
10h 45m
1 stop
CWL09:15Cardiff Wales
19 Oct
CWL17:15Cardiff Wales
31h 59m
2 stops
IAD20:14Washington, D.C. Dulles Intl
£831
Virgin Atlantic
16 Nov
IAD10:06Washington, D.C. Dulles Intl
18h 44m
2 stops
CWL09:50Cardiff Wales
26 Nov
CWL17:30Cardiff Wales
32h 57m
2 stops
IAD21:27Washington, D.C. Dulles Intl
£835

KLM flights from Washington, D.C. to Cardiff

Our best KLM deals on Washington, D.C. to Cardiff flight tickets
KLM
16 Nov
IAD12:30Washington, D.C. Dulles Intl
16h 20m
2 stops
CWL09:50Cardiff Wales
26 Nov
CWL17:30Cardiff Wales
27h 25m
1 stop
IAD15:55Washington, D.C. Dulles Intl
£827
KLM
5 Nov
DCA11:05Washington, D.C. Reagan-National
17h 45m
2 stops
CWL09:50Cardiff Wales
10 Nov
CWL17:30Cardiff Wales
28h 05m
2 stops
DCA16:35Washington, D.C. Reagan-National
£909
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
£921

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 16 August 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 Washington, D.C. Reagan-National - CWL Cardiff Wales

DCACWL

Washington, D.C. Reagan-National

Sun 4/10

20:40-21:45

2 stops20h 05m

Cardiff Wales

Mon 19/10

22:10-22:34

3 stops29h 24m

£615

Washington, D.C.Cardiff

IAD Washington, D.C. Dulles Intl - CWL Cardiff Wales

IADCWL

Washington, D.C. Dulles Intl

Tue 29/9

17:15-23:25

1 stop25h 10m

Cardiff Wales

Tue 6/10

21:45-15:30

2 stops22h 45m

£643

Washington, D.C.Cardiff

DCA Washington, D.C. Reagan-National - CWL Cardiff Wales

DCACWL

Washington, D.C. Reagan-National

Sun 4/10

20:40-16:45

3 stops39h 05m

Cardiff Wales

Mon 19/10

22:10-22:34

3 stops29h 24m

£646

Washington, D.C.Cardiff

IAD Washington, D.C. Dulles Intl - CWL Cardiff Wales

IADCWL

Washington, D.C. Dulles Intl

Tue 29/9

16:00-23:25

2 stops26h 25m

Cardiff Wales

Tue 6/10

21:45-19:00

2 stops26h 15m

£656

Washington, D.C.Cardiff

IAD Washington, D.C. Dulles Intl - CWL Cardiff Wales

IADCWL

Washington, D.C. Dulles Intl

Sun 4/10

15:45-21:45

3 stops25h 00m

Cardiff Wales

Mon 19/10

22:10-21:24

3 stops28h 14m

£661

Washington, D.C.Cardiff

IAD Washington, D.C. Dulles Intl - CWL Cardiff Wales

IADCWL

Washington, D.C. Dulles Intl

Sun 4/10

12:43-21:45

2 stops28h 02m

Cardiff Wales

Mon 19/10

13:35-19:35

2 stops35h 00m

£695

Washington, D.C.Cardiff

IAD Washington, D.C. Dulles Intl - CWL Cardiff Wales

IADCWL

Washington, D.C. Dulles Intl

Mon 5/10

20:55-22:50

1 stop20h 55m

Cardiff Wales

Fri 9/10

22:45-15:10

2 stops21h 25m

£706
Fastest return journey

Washington, D.C.Cardiff

IAD Washington, D.C. Dulles Intl - CWL Cardiff Wales

IADCWL

Washington, D.C. Dulles Intl

Mon 5/10

20:55-22:50

1 stop20h 55m

Cardiff Wales

Fri 9/10

07:45-15:45

1 stop13h 00m

£718

Washington, D.C.Cardiff

IAD Washington, D.C. Dulles Intl - CWL Cardiff Wales

IADCWL

Washington, D.C. Dulles Intl

Tue 29/9

09:55-23:25

3 stops32h 30m

Cardiff Wales

Tue 6/10

21:45-19:00

2 stops26h 15m

£737

Washington, D.C.Cardiff

IAD Washington, D.C. Dulles Intl - CWL Cardiff Wales

IADCWL

Washington, D.C. Dulles Intl

Mon 14/9

15:45-22:50

3 stops26h 05m

Cardiff Wales

Mon 21/9

10:25-15:10

2 stops33h 45m

£744

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 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 and KLM 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

15h 20m

Direct flights

None
The fastest flight from Washington, D.C. to Cardiff takes 15h 20m
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 15h 20m, 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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Airports servicing Wales

Holyhead Anglesey Airport