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Cheap flights from Cardiff to Washington, D.C. from £355

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 31/5. 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
1 adult, Economy, 0 bags
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Cheap return flights

Enter your travel dates to find the best prices.
Air France Logo
17:15 - 15:35
CWL
-
IAD
27h 20m
1 stop
Air France Logo
17:40 - 17:05
IAD
-
CWL
18h 25m
1 stop
£810Air France
Fri, 24 Apr - Fri, 1 May
Multiple Airlines Logo
22:45 - 21:18
CWL
-
IAD
27h 33m
3 stops
Multiple Airlines Logo
17:40 - 09:15
IAD
-
CWL
10h 35m
1 stop
£813Multiple Airlines
Fri, 24 Apr - Fri, 1 May
Multiple Airlines Logo
22:45 - 15:45
CWL
-
IAD
22h 00m
1 stop
Multiple Airlines Logo
17:05 - 09:10
IAD
-
CWL
35h 05m
2 stops
£828Multiple Airlines
Fri, 24 Apr - Fri, 1 May
Air France Logo
17:35 - 15:35
CWL
-
IAD
27h 00m
1 stop
Air France Logo
17:40 - 16:45
IAD
-
CWL
18h 05m
1 stop
£834Air France
Sat, 25 Apr - Sat, 2 May
Virgin Atlantic Logo
09:45 - 15:35
CWL
-
IAD
10h 50m
1 stop
Virgin Atlantic Logo
06:00 - 09:15
IAD
-
CWL
22h 15m
2 stops
£849Virgin Atlantic
Sat, 25 Apr - Sat, 2 May
Virgin Atlantic Logo
09:45 - 00:27
CWL
-
IAD
19h 42m
2 stops
Virgin Atlantic Logo
06:00 - 09:15
IAD
-
CWL
22h 15m
2 stops
£889Virgin Atlantic
Sat, 25 Apr - Sat, 2 May
Multiple Airlines Logo
09:45 - 16:45
CWL
-
IAD
36h 00m
3 stops
Multiple Airlines Logo
22:20 - 09:15
IAD
-
CWL
29h 55m
3 stops
£912Multiple Airlines
Fri, 24 Apr - Fri, 1 May
Multiple Airlines Logo
12:00 - 15:45
CWL
-
IAD
32h 45m
3 stops
Multiple Airlines Logo
20:55 - 17:05
IAD
-
CWL
15h 10m
2 stops
£989Multiple Airlines
Fri, 24 Apr - Fri, 1 May
Multiple Airlines Logo
07:30 - 19:20
CWL
-
IAD
16h 50m
2 stops
Multiple Airlines Logo
20:30 - 09:15
IAD
-
CWL
31h 45m
3 stops
£1,023Multiple Airlines
Sat, 25 Apr - Sat, 2 May
Multiple Airlines Logo
17:35 - 19:00
CWL
-
IAD
30h 25m
3 stops
Multiple Airlines Logo
20:30 - 11:30
IAD
-
CWL
34h 00m
3 stops
£1,147Multiple Airlines
Sat, 25 Apr - Sat, 2 May

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

Our best Air France deals on Cardiff to Washington, D.C. Dulles Intl Airport flight tickets
Air France
24 Apr
CWL17:15Cardiff Wales
27h 20m
1 stop
IAD15:35Washington, D.C. Dulles Intl
1 May
IAD17:40Washington, D.C. Dulles Intl
18h 25m
1 stop
CWL17:05Cardiff Wales
£810
Air France
25 Apr
CWL17:35Cardiff Wales
27h 00m
1 stop
IAD15:35Washington, D.C. Dulles Intl
2 May
IAD17:40Washington, D.C. Dulles Intl
18h 05m
1 stop
CWL16:45Cardiff Wales
£834

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
25 Apr
CWL09:45Cardiff Wales
10h 50m
1 stop
IAD15:35Washington, D.C. Dulles Intl
2 May
IAD06:00Washington, D.C. Dulles Intl
22h 15m
2 stops
CWL09:15Cardiff Wales
£849
Virgin Atlantic
25 Apr
CWL09:45Cardiff Wales
19h 42m
2 stops
IAD00:27Washington, D.C. Dulles Intl
2 May
IAD06:00Washington, D.C. Dulles Intl
22h 15m
2 stops
CWL09:15Cardiff Wales
£889
Virgin Atlantic
6 Jun
CWL09:45Cardiff Wales
18h 11m
2 stops
IAD22:56Washington, D.C. Dulles Intl
12 Jun
IAD17:40Washington, D.C. Dulles Intl
18h 25m
1 stop
CWL17:05Cardiff Wales
£2,805

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 13 March 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

Fri 24/4

17:15-15:35

1 stop27h 20m

Washington, D.C. Dulles Intl

Fri 1/5

17:40-17:05

1 stop18h 25m

£810

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Fri 24/4

22:45-21:18

3 stops27h 33m

Washington, D.C. Dulles Intl

Fri 1/5

17:40-09:15

1 stop10h 35m

£813

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Fri 24/4

22:45-15:45

1 stop22h 00m

Washington, D.C. Dulles Intl

Fri 1/5

17:05-09:10

2 stops35h 05m

£828

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sat 25/4

17:35-15:35

1 stop27h 00m

Washington, D.C. Dulles Intl

Sat 2/5

17:40-16:45

1 stop18h 05m

£834
Fastest return journey

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sat 25/4

09:45-15:35

1 stop10h 50m

Washington, D.C. Dulles Intl

Sat 2/5

06:00-09:15

2 stops22h 15m

£849

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sat 25/4

09:45-00:27

2 stops19h 42m

Washington, D.C. Dulles Intl

Sat 2/5

06:00-09:15

2 stops22h 15m

£889

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Fri 24/4

09:45-16:45

3 stops36h 00m

Washington, D.C. Dulles Intl

Fri 1/5

22:20-09:15

3 stops29h 55m

£912

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Fri 24/4

12:00-15:45

3 stops32h 45m

Washington, D.C. Dulles Intl

Fri 1/5

20:55-17:05

2 stops15h 10m

£989

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sat 25/4

07:30-19:20

2 stops16h 50m

Washington, D.C. Dulles Intl

Sat 2/5

20:30-09:15

3 stops31h 45m

£1,023

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sat 25/4

17:35-19:00

3 stops30h 25m

Washington, D.C. Dulles Intl

Sat 2/5

20:30-11:30

3 stops34h 00m

£1,147

Flights are sorted by cheapest return flights first.

Showing 1-10 of 18 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?

WestJet and Air France 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

27h 00m

Direct flights

None
The fastest flight from Cardiff to Washington, D.C. Dulles Intl Airport takes 27h 00m
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

  • 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 27h 00m.

  • 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
Laurel
College Park
Arlington
Fairfax
Linthicum Heights
Alexandria
Glen Burnie
Front Royal
Lutherville Timonium
Winchester
Ellicott City
Cambridge
Lexington Park
Westminster
Woodbridge
Bethesda
Ashburn
Sterling
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. 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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