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Cheap flights from Washington, D.C. Dulles Intl Airport to Cardiff from £271

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 26/7. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — CWL
30 May — 6 Jun1
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 30 April 2026.

Wed 10/608:18
IAD
-
CWL
2 stops20h 57m
Multiple Airlines
Wed 17/623:30
CWL
-
IAD
3 stops26h 56m
Multiple Airlines
Deal found 28/4£729
Sun 26/420:55
IAD
-
CWL
1 stop19h 50m
Multiple Airlines
Tue 12/523:15
CWL
-
IAD
2 stops40h 31m
Multiple Airlines
Deal found 25/4£796
Sun 3/517:15
IAD
-
CWL
1 stop23h 30m
Multiple Airlines
Tue 19/521:45
CWL
-
IAD
2 stops26h 15m
Multiple Airlines
Deal found 28/4£822
Mon 31/818:10
IAD
-
CWL
1 stop17h 35m
KLM
Wed 9/917:15
CWL
-
IAD
1 stop27h 20m
KLM
Deal found 27/4£849
Mon 31/812:30
IAD
-
CWL
2 stops15h 45m
Delta
Wed 9/909:45
CWL
-
IAD
1 stop10h 50m
Delta
Deal found 27/4£853
Sun 3/517:40
IAD
-
CWL
1 stop10h 35m
Virgin Atlantic
Tue 19/509:45
CWL
-
IAD
1 stop10h 50m
Virgin Atlantic
Deal found 28/4£865

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 30 April 2026.

Round-trip from

£729

One-way from

£271
10/6-17/6
  • 10/6-17/6
  • 5 total stops
  • 47h 53m total
  • Washington, D.C. to Cardiff
Search Deals
26/7
  • 26/7
  • 1 total stop
  • 13h 15m 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 30 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

Wed 10/6

09:55-10:15

1 stop19h 20m

Cardiff Wales

Wed 17/6

23:30-21:26

3 stops26h 56m

£738
Fastest return journey

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mon 31/8

18:10-09:15

1 stop10h 05m

Cardiff Wales

Wed 9/9

09:45-15:35

1 stop10h 50m

£849

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mon 31/8

12:30-09:15

2 stops15h 45m

Cardiff Wales

Wed 9/9

09:45-15:35

1 stop10h 50m

£853
Cheapest one-way

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 2/9

17:15-22:25

1 stop24h 10m

£288

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 26/7

15:16-10:15

2 stops37h 59m

£290
Fastest single journey

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 2/9

12:30-09:15

2 stops15h 45m

£343

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 10/7

08:18-10:15

2 stops20h 57m

£380

Flights are sorted by cheapest return flights first.

Deals found on 29/4

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 05m. 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
Barry
Bridgend

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Users can book flights with no change fees policies with our dedicated filters. Book flights from Dulles Intl to Cardiff flexibly with Cheapflights today.

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