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Cheap flights from Washington, D.C. Dulles Intl Airport to Cardiff from £266

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 17/5. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — CWL
23 Apr — 30 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Dulles Intl to Cardiff

Enter your travel dates to find the best prices.

Cheapest flights from Dulles Intl to Cardiff
Explore the most affordable flight options available from Dulles Intl to Cardiff. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 24 March 2026.

Tue 5/521:05
IAD
-
CWL
1 stop21h 00m
Multiple Airlines
Tue 12/521:45
CWL
-
IAD
2 stops26h 15m
Multiple Airlines
Deal found 21/3£723
Wed 1/716:20
IAD
-
CWL
1 stop12h 55m
Multiple Airlines
Sat 11/711:35
CWL
-
IAD
1 stop13h 49m
Multiple Airlines
Deal found 20/3£732
Sun 3/517:15
IAD
-
CWL
1 stop23h 30m
Multiple Airlines
Sun 10/517:40
CWL
-
IAD
2 stops30h 45m
Multiple Airlines
Deal found 19/3£761
Wed 6/520:55
IAD
-
CWL
1 stop20h 30m
Multiple Airlines
Wed 13/523:30
CWL
-
IAD
2 stops20h 40m
Multiple Airlines
Deal found 22/3£794
Mon 11/517:15
IAD
-
CWL
1 stop24h 35m
Multiple Airlines
Mon 18/522:10
CWL
-
IAD
1 stop22h 35m
Multiple Airlines
Deal found 18/3£803
Fri 1/517:05
IAD
-
CWL
2 stops35h 05m
Multiple Airlines
Sun 10/521:45
CWL
-
IAD
1 stop26h 40m
Multiple Airlines
Deal found 19/3£806
Tue 5/517:40
IAD
-
CWL
1 stop10h 35m
Virgin Atlantic
Tue 12/517:15
CWL
-
IAD
1 stop27h 20m
Virgin Atlantic
Deal found 21/3£826

Find flight deals from Dulles Intl to Cardiff

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Cardiff (CWL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 24 March 2026.

Round-trip from

£679

One-way from

£266
21/4-28/4
  • 21/4-28/4
  • 3 total stops
  • 65h 49m total
  • Washington, D.C. to Cardiff
Search Deals
17/5
  • 17/5
  • 3 total stops
  • 45h 20m total
  • Washington, D.C. to Cardiff
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Dulles Intl 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, Cheapflights users made 858,174 searches. Data last updated 24 March 2026.
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

Cheapest return flight

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Tue 5/5

21:05-23:05

1 stop21h 00m

Cardiff Wales

Tue 12/5

21:45-19:00

2 stops26h 15m

£723
Fastest return journey

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 1/7

16:20-10:15

1 stop12h 55m

Cardiff Wales

Sat 11/7

11:35-20:24

1 stop13h 49m

£732

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 6/5

20:55-22:25

1 stop20h 30m

Cardiff Wales

Wed 13/5

23:30-15:10

2 stops20h 40m

£794

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mon 11/5

17:15-22:50

1 stop24h 35m

Cardiff Wales

Mon 18/5

22:10-15:45

1 stop22h 35m

£803

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Thu 7/5

17:40-16:45

1 stop18h 05m

Cardiff Wales

Thu 14/5

09:45-15:35

1 stop10h 50m

£844

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 6/5

12:45-09:15

2 stops15h 30m

Cardiff Wales

Wed 13/5

09:45-21:24

2 stops16h 39m

£850

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Thu 7/5

22:35-09:15

3 stops29h 40m

Cardiff Wales

Thu 14/5

22:50-20:29

2 stops26h 39m

£884
Cheapest one-way

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 17/5

20:30-22:50

3 stops45h 20m

£266
Fastest single journey

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 3/5

22:35-15:50

2 stops36h 15m

£367

Flights are sorted by cheapest return flights first.

Deals found on 22/3

Sorted by cheapest first

Best time to book a flight from Dulles Intl to Cardiff

Have a flexible travel schedule? Discover the best time to fly to Cardiff from Dulles Intl with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Cardiff. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Cardiff from Washington, D.C. Dulles Intl?

    Located just 9.1 mi from the city center, Cardiff Wales is the airport most travelers will use when flying to Cardiff from Washington, D.C. Dulles Intl. Booking flights from Washington, D.C. Dulles Intl to Cardiff Wales (CWL) should be relatively easy as there are 0 daily inbound flights from Washington, D.C. Dulles Intl from 0 different airlines.

  • Can I find deals for flights from Dulles Intl to Cardiff that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Cardiff flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Cardiff?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Cardiff.

  • Can I find deals for business class flights from Dulles Intl to Cardiff?

    Yes. Cheapflights offers flight deals from Dulles Intl to Cardiff by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Travelling to a place near Cardiff?

Book flights to Cardiff if you plan to visit one of these locations
Barry
Bridgend

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