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Cheap flights from Washington, D.C. Dulles Intl Airport to Cardiff from £249

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 21/10. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — CWL
9 Sep — 16 Sep1
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 10 August 2026.

Sun 6/917:15 -
1 stop23h 30m
Sun 13/914:45 -
2 stops33h 15m
Deal found 9/8£768
Tue 22/920:30 -
2 stops21h 55m
Sat 26/907:30 -
1 stop13h 15m
Deal found 9/8£776
Sat 19/920:30 -
3 stops19h 50m
Sat 26/912:30 -
2 stops35h 55m
Deal found 7/8£779
Thu 3/1217:05 -
1 stop17h 35m
Mon 7/1208:35 -
1 stop12h 00m
Deal found 6/8£825

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 10 August 2026.

Round-trip from

£768

One-way from

£249
6/9-13/9
  • 6/9-13/9
  • 3 total stops
  • 56h 45m total
  • Washington, D.C. to Cardiff
Search Deals
21/10
  • 21/10
  • 3 total stops
  • 18h 10m 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 10 August 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 Washington, D.C. Dulles Intl - CWL Cardiff Wales

IADCWL

Washington, D.C. Dulles Intl

Sat 26/9

20:30-21:20

2 stops19h 50m

Cardiff Wales

Sat 3/10

07:30-15:45

1 stop13h 15m

£776

Washington, D.C.Cardiff

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

IADCWL

Washington, D.C. Dulles Intl

Sat 19/9

09:45-21:20

3 stops30h 35m

Cardiff Wales

Sat 26/9

07:30-19:10

1 stop16h 40m

£817

Washington, D.C.Cardiff

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

IADCWL

Washington, D.C. Dulles Intl

Tue 22/9

20:30-23:25

2 stops21h 55m

Cardiff Wales

Sat 26/9

07:30-11:30

2 stops33h 00m

£853

Washington, D.C.Cardiff

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

IADCWL

Washington, D.C. Dulles Intl

Thu 3/12

12:35-09:50

2 stops16h 15m

Cardiff Wales

Mon 7/12

17:30-15:45

1 stop27h 15m

£866

Washington, D.C.Cardiff

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

IADCWL

Washington, D.C. Dulles Intl

Sun 15/11

19:27-17:00

2 stops16h 33m

Cardiff Wales

Sun 22/11

17:30-16:26

2 stops27h 56m

£874

Washington, D.C.Cardiff

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

IADCWL

Washington, D.C. Dulles Intl

Thu 3/12

19:40-15:40

2 stops15h 00m

Cardiff Wales

Mon 7/12

08:35-14:45

3 stops35h 10m

£920
Fastest return journey

Washington, D.C.Cardiff

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

IADCWL

Washington, D.C. Dulles Intl

Mon 31/8

18:10-16:45

1 stop17h 35m

Cardiff Wales

Wed 9/9

09:45-15:35

1 stop10h 50m

£923
Cheapest one-way

Washington, D.C.Cardiff

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

IADCWL

Washington, D.C. Dulles Intl

Wed 21/10

23:15-22:25

3 stops18h 10m

£249
Fastest single journey

Washington, D.C.Cardiff

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

IADCWL

Washington, D.C. Dulles Intl

Sat 26/9

17:30-09:15

1 stop10h 45m

£433

Washington, D.C.Cardiff

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

IADCWL

Washington, D.C. Dulles Intl

Sat 26/9

11:15-09:15

2 stops17h 00m

£436

Flights are sorted by cheapest return flights first.

Deals found on 9/8

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

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.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Cardiff?

    Departing from Washington, D.C. Dulles Intl Airport to Cardiff will take you 16h 15m. Washington, D.C. Dulles Intl Airport and Cardiff are separated by a distance of 3548 mi.

  • 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
Bridgend
Barry

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