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Cheap flights from Washington, D.C. Dulles Intl Airport to Cardiff from £354

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. Dulles Intl Airport to Cardiff departing on 25/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Cardiff

Cheap return flights

Enter your travel dates to find the best prices.
KLM Logo
19:05 - 09:50IAD-CWL
10h 45m1 stop
KLM Logo
17:25 - 16:05CWL-IAD
27h 40m1 stop
£583KLM
Find Deal
Thu, 30 Oct - Thu, 13 Nov
Virgin Atlantic Logo
18:05 - 09:50IAD-CWL
10h 45m1 stop
Virgin Atlantic Logo
17:30 - 16:05CWL-IAD
27h 35m1 stop
£583Virgin Atlantic
Find Deal
Wed, 12 Nov - Sun, 16 Nov
KLM Logo
13:00 - 09:50IAD-CWL
15h 50m2 stops
KLM Logo
17:30 - 16:05CWL-IAD
27h 35m1 stop
£586KLM
Find Deal
Tue, 4 Nov - Sun, 9 Nov
KLM Logo
18:05 - 09:50IAD-CWL
10h 45m1 stop
KLM Logo
17:30 - 17:05CWL-IAD
27h 35m1 stop
£589KLM
Find Deal
Wed, 25 Feb - Sun, 8 Mar
Delta Logo
19:05 - 16:45IAD-CWL
17h 40m1 stop
Delta Logo
10:20 - 19:08CWL-IAD
13h 48m2 stops
£590Delta
Find Deal
Thu, 30 Oct - Thu, 13 Nov
Delta Logo
19:05 - 09:50IAD-CWL
10h 45m1 stop
Delta Logo
10:20 - 00:16CWL-IAD
18h 56m2 stops
£591Delta
Find Deal
Thu, 30 Oct - Thu, 13 Nov
KLM Logo
12:30 - 09:50IAD-CWL
16h 20m2 stops
KLM Logo
17:30 - 17:05CWL-IAD
27h 35m1 stop
£592KLM
Find Deal
Wed, 25 Feb - Sun, 8 Mar
Delta Logo
10:05 - 09:50IAD-CWL
18h 45m2 stops
Delta Logo
10:20 - 19:08CWL-IAD
13h 48m2 stops
£594Delta
Find Deal
Wed, 12 Nov - Sun, 16 Nov
Multiple Airlines Logo
09:45 - 15:30IAD-CWL
24h 45m3 stops
Multiple Airlines Logo
21:20 - 15:15CWL-IAD
22h 55m2 stops
£732Multiple Airlines
Find Deal
Tue, 4 Nov - Sun, 9 Nov
Multiple Airlines Logo
18:05 - 10:05IAD-CWL
12h 00m1 stop
Multiple Airlines Logo
15:35 - 22:00CWL-IAD
34h 25m3 stops
£822Multiple Airlines
Find Deal
Wed, 25 Mar - Thu, 26 Mar

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

Our best KLM deals on Washington, D.C. Dulles Intl Airport to Cardiff flight tickets
KLM
30 Oct
IAD19:05Washington, D.C. Dulles Intl
10h 45m
1 stop
CWL09:50Cardiff Wales
13 Nov
CWL17:25Cardiff Wales
27h 40m
1 stop
IAD16:05Washington, D.C. Dulles Intl
£583
Find similar
KLM
4 Nov
IAD13:00Washington, D.C. Dulles Intl
15h 50m
2 stops
CWL09:50Cardiff Wales
9 Nov
CWL17:30Cardiff Wales
27h 35m
1 stop
IAD16:05Washington, D.C. Dulles Intl
£586
Find similar
KLM
25 Feb
IAD18:05Washington, D.C. Dulles Intl
10h 45m
1 stop
CWL09:50Cardiff Wales
8 Mar
CWL17:30Cardiff Wales
27h 35m
1 stop
IAD17:05Washington, D.C. Dulles Intl
£589
Find similar

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

Our best Delta deals on Washington, D.C. Dulles Intl Airport to Cardiff flight tickets
Delta
13 Oct
IAD17:25Washington, D.C. Dulles Intl
10h 50m
1 stop
CWL09:15Cardiff Wales
22 Oct
CWL09:50Cardiff Wales
10h 45m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£582
Find similar
Delta
13 Oct
IAD10:11Washington, D.C. Dulles Intl
18h 04m
2 stops
CWL09:15Cardiff Wales
22 Oct
CWL09:50Cardiff Wales
10h 45m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£586
Find similar
Delta
30 Oct
IAD19:05Washington, D.C. Dulles Intl
17h 40m
1 stop
CWL16:45Cardiff Wales
13 Nov
CWL10:20Cardiff Wales
13h 48m
2 stops
IAD19:08Washington, D.C. Dulles Intl
£590
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Washington, D.C. Dulles Intl Airport 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 10 October 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Cardiff that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Thu 30/10

19:05-09:50

1 stop10h 45m

Cardiff Wales

Thu 13/11

17:25-16:05

1 stop27h 40m

£583

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 12/11

18:05-09:50

1 stop10h 45m

Cardiff Wales

Sun 16/11

17:30-16:05

1 stop27h 35m

£583

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Tue 4/11

13:00-09:50

2 stops15h 50m

Cardiff Wales

Sun 9/11

17:30-16:05

1 stop27h 35m

£586

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 25/2

18:05-09:50

1 stop10h 45m

Cardiff Wales

Sun 8/3

17:30-17:05

1 stop27h 35m

£589

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Thu 30/10

19:05-16:45

1 stop17h 40m

Cardiff Wales

Thu 13/11

10:20-19:08

2 stops13h 48m

£590

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Thu 30/10

19:05-09:50

1 stop10h 45m

Cardiff Wales

Thu 13/11

10:20-00:16

2 stops18h 56m

£591

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 25/2

12:30-09:50

2 stops16h 20m

Cardiff Wales

Sun 8/3

17:30-17:05

1 stop27h 35m

£592

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 12/11

10:05-09:50

2 stops18h 45m

Cardiff Wales

Sun 16/11

10:20-19:08

2 stops13h 48m

£594

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Tue 4/11

09:45-15:30

3 stops24h 45m

Cardiff Wales

Sun 9/11

21:20-15:15

2 stops22h 55m

£732

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 25/3

18:05-10:05

1 stop12h 00m

Cardiff Wales

Thu 26/3

15:35-22:00

3 stops34h 25m

£822

Flights are sorted by cheapest return flights first.

Showing 1-10 of 13 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. Dulles Intl Airport 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. Dulles Intl to Cardiff Wales?

KLM is the most popular carrier operating from Washington, D.C. Dulles Intl to Cardiff Wales

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

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

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

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

Direct flights

None
There are no direct flights from Washington, D.C. Dulles Intl Airport to Cardiff. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to Cardiff.
Search flight deals

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

    A flight from Washington, D.C. Dulles Intl to Cardiff Wales will travel around 3552.6 mi. 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. Dulles Intl Airport to Cardiff Wales Airport?

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to Cardiff Wales Airport.

  • What documentation or ID do you need to fly to Cardiff Wales Airport?

    The required travel and health documents for your Cardiff Wales 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 Cardiff Wales Airport. We recommend that you seek guidance from your airline or a reliable 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?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington, D.C. to Cardiff. momondo saves you time and could save you money on your trip.

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

Flights from Washington, D.C. to Cardiff with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once all potential Washington, D.C. to Cardiff 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 Washington, D.C. to Cardiff right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Cardiff from Washington, D.C.. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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