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Cheap flights from Cardiff to Washington, D.C. from £472

This is the cheapest one-way 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 19/9. 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
£586Multiple 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
£601Multiple Airlines
Sat, 12 Sep - Sat, 19 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
£605Multiple 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
£635Air France
Sat, 5 Sep - Mon, 21 Sep
Virgin Atlantic Logo
17:15 - 15:35
CWL
-
IAD
27h 20m
1 stop
Virgin Atlantic Logo
17:40 - 16:45
IAD
-
CWL
18h 05m
1 stop
£663Virgin Atlantic
Tue, 8 Sep - Tue, 15 Sep
KLM Logo
17:15 - 15:35
CWL
-
IAD
27h 20m
1 stop
KLM Logo
12:25 - 09:15
IAD
-
CWL
15h 50m
2 stops
£668KLM
Tue, 8 Sep - Tue, 15 Sep
Multiple Airlines Logo
09:45 - 23:14
CWL
-
IAD
18h 29m
2 stops
Multiple Airlines Logo
11:10 - 09:15
IAD
-
CWL
17h 05m
2 stops
£672Multiple Airlines
Tue, 8 Sep - Tue, 15 Sep
Virgin Atlantic Logo
09:45 - 15:35
CWL
-
IAD
10h 50m
1 stop
Virgin Atlantic Logo
18:26 - 16:45
IAD
-
CWL
17h 19m
2 stops
£678Virgin Atlantic
Sat, 12 Sep - Sat, 19 Sep
Multiple Airlines Logo
11:35 - 07:43
CWL
-
IAD
25h 08m
2 stops
Multiple Airlines Logo
09:55 - 21:20
IAD
-
CWL
30h 25m
2 stops
£700Multiple Airlines
Sat, 12 Sep - Sat, 19 Sep
Multiple Airlines Logo
11:35 - 07:43
CWL
-
IAD
25h 08m
2 stops
Multiple Airlines Logo
09:45 - 21:20
IAD
-
CWL
30h 35m
3 stops
£704Multiple Airlines
Sat, 12 Sep - Sat, 19 Sep

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KLM flights from Cardiff to Washington, D.C. Dulles Intl Airport

Our best KLM deals on Cardiff to Washington, D.C. Dulles Intl Airport flight tickets
KLM
8 Sept
CWL17:15Cardiff Wales
27h 20m
1 stop
IAD15:35Washington, D.C. Dulles Intl
15 Sept
IAD12:25Washington, D.C. Dulles Intl
15h 50m
2 stops
CWL09:15Cardiff Wales
£668
KLM
19 Dec
CWL17:30Cardiff Wales
27h 15m
1 stop
IAD15:45Washington, D.C. Dulles Intl
27 Dec
IAD17:45Washington, D.C. Dulles Intl
18h 15m
1 stop
CWL17:00Cardiff Wales
£3,747
KLM
19 Dec
CWL17:30Cardiff Wales
27h 15m
1 stop
IAD15:45Washington, D.C. Dulles Intl
27 Dec
IAD21:30Washington, D.C. Dulles Intl
14h 30m
2 stops
CWL17:00Cardiff Wales
£3,766

Virgin Atlantic flights from Cardiff to Washington, D.C. Dulles Intl Airport

Our best Virgin Atlantic deals on Cardiff to Washington, D.C. Dulles Intl Airport flight tickets
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
£663
Virgin Atlantic
12 Sept
CWL09:45Cardiff Wales
10h 50m
1 stop
IAD15:35Washington, D.C. Dulles Intl
19 Sept
IAD18:26Washington, D.C. Dulles Intl
17h 19m
2 stops
CWL16:45Cardiff Wales
£678

momondo Fare Finder

 
Customise your flight search to find flights from Cardiff to Washington, D.C. Dulles Intl Airport 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 29 July 2026.
Use the filters below to find and compare flights from Cardiff to Washington, D.C. Dulles Intl Airport 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

£586

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

£601

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

£605

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

£635

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Tue 8/9

17:15-15:35

1 stop27h 20m

Washington, D.C. Dulles Intl

Tue 15/9

17:40-16:45

1 stop18h 05m

£663

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Tue 8/9

17:15-15:35

1 stop27h 20m

Washington, D.C. Dulles Intl

Tue 15/9

12:25-09:15

2 stops15h 50m

£668

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Tue 8/9

09:45-23:14

2 stops18h 29m

Washington, D.C. Dulles Intl

Tue 15/9

11:10-09:15

2 stops17h 05m

£672
Fastest return journey

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sat 12/9

09:45-15:35

1 stop10h 50m

Washington, D.C. Dulles Intl

Sat 19/9

18:26-16:45

2 stops17h 19m

£678

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sat 12/9

11:35-07:43

2 stops25h 08m

Washington, D.C. Dulles Intl

Sat 19/9

09:55-21:20

2 stops30h 25m

£700

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sat 12/9

11:35-07:43

2 stops25h 08m

Washington, D.C. Dulles Intl

Sat 19/9

09:45-21:20

3 stops30h 35m

£704

Flights are sorted by cheapest return flights first.

Showing 1-10 of 16 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. Dulles Intl Airport

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 Cardiff Wales to Washington, D.C. Dulles Intl?

Delta and Virgin Atlantic are the most popular carriers operating from Cardiff Wales to Washington, D.C. Dulles Intl

When to book flights from Cardiff to Washington, D.C. Dulles Intl Airport

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

Cheap Cardiff to Washington, D.C. Dulles Intl Airport (CWL to IAD) flight deals and tips

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

Fastest flight time

13h 49m

Direct flights

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

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

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

    Cardiff Wales and Washington, D.C. Dulles Intl are 3552.6 mi apart from one another. A reasonable flight in good conditions will take 13h 49m.

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

    Prices for flights from Cardiff Wales Airport to Washington, D.C. Dulles Intl Airport were last updated today.

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Cardiff Wales Airport to Washington, D.C. Dulles Intl Airport.

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

    The required travel and health documents for your Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport. 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
Front Royal
Winchester
Ellicott City
Cambridge
Glen Burnie
Westminster
Laurel
Lutherville Timonium
Owings Mills
Lexington Park
Leesburg
Woodbridge

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

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

Once all potential Cardiff to Washington, D.C. flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are not ready to book a flight from Cardiff to Washington, D.C. now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Washington, D.C. and let you know when they change.

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