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Cheap flights from Washington, D.C. Dulles Intl Airport to Cardiff from £577

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/2. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — CWL
24 Jan — 31 Jan1
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 25 December 2025.

Sat 27/1218:05IAD - CWL
1 stop17h 45mKLM
Wed 31/1217:25CWL - IAD
1 stop27h 40mKLM
Deal found 24/12£1,593
Sat 27/1218:05IAD - CWL
1 stop17h 45mDelta
Wed 31/1210:20CWL - IAD
2 stops28h 29mDelta
Deal found 24/12£1,601

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 25 December 2025.

Round-trip from

£577
KLM
  • KLM
  • 7/2-14/2
  • 2 total stops
  • 45h 25m 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 25 December 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

Dulles Intl

Fly to

Cardiff

Route

Depart

Return

Price

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sat 7/2

18:05-16:50

1 stop17h 45m

Cardiff Wales

Sat 14/2

17:25-16:05

1 stop27h 40m

£577

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 8/2

18:05-09:50

1 stop10h 45m

Cardiff Wales

Sun 15/2

17:30-16:05

1 stop27h 35m

£578

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 6/2

12:32-09:50

2 stops16h 18m

Cardiff Wales

Fri 13/2

17:15-16:05

1 stop27h 50m

£581

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sat 7/2

07:00-09:45

2 stops21h 45m

Cardiff Wales

Sat 14/2

10:20-00:21

2 stops19h 01m

£588

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 6/2

15:42-16:55

2 stops20h 13m

Cardiff Wales

Fri 13/2

10:20-23:09

2 stops17h 49m

£588

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Thu 9/4

17:40-09:15

1 stop10h 35m

Cardiff Wales

Sat 18/4

17:35-15:35

1 stop27h 00m

£588

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 6/2

17:05-19:40

1 stop21h 35m

Cardiff Wales

Fri 13/2

22:25-15:35

1 stop22h 10m

£762

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 22/5

17:40-09:15

1 stop10h 35m

Cardiff Wales

Sat 30/5

09:45-15:35

1 stop10h 50m

£862

Flights are sorted by cheapest return flights first.

Deals found on 24/12

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 17h 45m. 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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Can Cheapflights find flights from Dulles Intl to Cardiff with no change fees?

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