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Cheap flights from Washington, D.C. Dulles Intl Airport to Cardiff from £285

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 11/5. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — CWL
17 May — 24 May1
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 17 April 2026.

Mon 1/609:45
IAD
-
CWL
2 stops19h 30m
Multiple Airlines
Mon 8/622:10
CWL
-
IAD
2 stops27h 19m
Multiple Airlines
Deal found 17/4£615
Sat 6/622:11
IAD
-
CWL
2 stops31h 04m
Multiple Airlines
Tue 9/623:15
CWL
-
IAD
2 stops26h 14m
Multiple Airlines
Deal found 14/4£748
Mon 13/716:00
IAD
-
CWL
1 stop13h 15m
Multiple Airlines
Mon 3/811:35
CWL
-
IAD
1 stop28h 11m
Multiple Airlines
Deal found 14/4£753
Sat 13/617:34
IAD
-
CWL
2 stops35h 41m
Multiple Airlines
Fri 19/622:45
CWL
-
IAD
3 stops27h 28m
Multiple Airlines
Deal found 17/4£758
Thu 10/920:45
IAD
-
CWL
1 stop20h 35m
Multiple Airlines
Fri 18/922:45
CWL
-
IAD
1 stop22h 00m
Multiple Airlines
Deal found 14/4£806

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 17 April 2026.

Round-trip from

£576

One-way from

£285
27/5-3/6
  • 27/5-3/6
  • 4 total stops
  • 39h 09m total
  • Washington, D.C. to Cardiff
Search Deals
11/5
  • 11/5
  • 3 total stops
  • 21h 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 17 April 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

Mon 13/7

16:00-10:15

1 stop13h 15m

Cardiff Wales

Mon 3/8

11:35-10:46

1 stop28h 11m

£753

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sat 13/6

15:45-21:20

3 stops24h 35m

Cardiff Wales

Fri 19/6

22:45-21:13

3 stops27h 28m

£824

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Thu 24/9

17:40-16:45

1 stop18h 05m

Cardiff Wales

Sun 27/9

09:50-15:35

1 stop10h 45m

£895
Fastest return journey

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Thu 24/9

17:40-09:15

1 stop10h 35m

Cardiff Wales

Sun 27/9

09:50-15:35

1 stop10h 45m

£897

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Tue 14/7

09:45-23:05

3 stops32h 20m

Cardiff Wales

Tue 21/7

11:35-15:01

2 stops32h 26m

£931

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mon 1/6

08:18-10:15

3 stops20h 57m

Cardiff Wales

Mon 8/6

11:35-11:12

3 stops28h 37m

£943

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mon 18/5

18:10-16:45

1 stop17h 35m

Cardiff Wales

Mon 25/5

17:15-15:35

1 stop27h 20m

£987

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 29/5

15:45-10:15

2 stops13h 30m

Cardiff Wales

Fri 5/6

22:45-20:29

3 stops26h 44m

£987

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 1/5

17:40-09:15

1 stop10h 35m

Cardiff Wales

Sat 9/5

17:35-15:35

1 stop27h 00m

£1,011
Cheapest one-way
Fastest single journey

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mon 11/5

20:30-20:30

2 stops43h 00m

£340

Flights are sorted by cheapest return flights first.

Deals found on 14/4

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.

  • 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 10h 35m. Washington, D.C. Dulles Intl Airport and Cardiff are separated by a distance of 3548 mi. This flight may include one or multiple stops.

  • 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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Can Cheapflights find flights from Dulles Intl to Cardiff with no change fees?

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