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Cheap flights from Washington, D.C. Dulles Intl Airport to Cardiff from £442

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 30/10. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — CWL
17 Oct — 24 Oct1
1 adult
1 adult, Economy

Cheap 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 September 2025.

Round-trip from

£442
30/10-6/11
  • 30/10-6/11
  • 4 total stops
  • 55h 40m total
  • Washington, D.C. to Cardiff
Search Deals

Find flight deals from Dulles Intl to Cardiff

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 September 2025.

Thu 30/1021:30IAD - CWL
2 stops20h 30mMultiple Airlines
Thu 6/1110:30CWL - IAD
2 stops35h 10mMultiple Airlines
Deal found 15/9£442
Thu 30/1019:05IAD - CWL
1 stop10h 45mVirgin Atlantic
Thu 6/1117:25CWL - IAD
1 stop27h 40mVirgin Atlantic
Deal found 15/9£586
Mon 13/1017:25IAD - CWL
1 stop10h 50mKLM
Wed 22/1017:15CWL - IAD
1 stop27h 20mKLM
Deal found 15/9£605
Mon 13/1017:25IAD - CWL
1 stop10h 50mDelta
Wed 22/1009:50CWL - IAD
1 stop10h 45mDelta
Deal found 16/9£606
Thu 30/1019:05IAD - CWL
1 stop17h 40mDelta
Thu 6/1110:20CWL - IAD
2 stops17h 40mDelta
Deal found 15/9£612
Thu 30/1019:05IAD - CWL
1 stop10h 45mDelta
Thu 13/1110:20CWL - IAD
2 stops13h 48mDelta
Deal found 16/9£613
Wed 1/1017:25IAD - CWL
1 stop18h 20mKLM
Sat 11/1017:35CWL - IAD
1 stop27h 00mKLM
Deal found 16/9£636

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 September 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

Thu 30/10

21:30-22:00

2 stops20h 30m

Cardiff Wales

Thu 6/11

10:30-16:40

2 stops35h 10m

£442

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Thu 30/10

19:05-09:50

1 stop10h 45m

Cardiff Wales

Thu 6/11

17:25-16:05

1 stop27h 40m

£586

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Thu 30/10

19:05-09:50

1 stop10h 45m

Cardiff Wales

Thu 13/11

17:25-16:05

1 stop27h 40m

£605

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mon 13/10

17:25-09:15

1 stop10h 50m

Cardiff Wales

Wed 22/10

17:15-15:35

1 stop27h 20m

£605

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mon 13/10

17:25-09:15

1 stop10h 50m

Cardiff Wales

Wed 22/10

09:50-15:35

1 stop10h 45m

£606

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 24/10

17:25-17:05

1 stop18h 40m

Cardiff Wales

Sat 1/11

17:25-17:05

1 stop27h 40m

£606

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 24/10

17:25-17:05

1 stop18h 40m

Cardiff Wales

Mon 3/11

17:15-16:05

1 stop27h 50m

£606

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 31/10

19:05-09:50

1 stop10h 45m

Cardiff Wales

Fri 7/11

17:15-16:05

1 stop27h 50m

£606

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Thu 23/10

17:25-16:45

1 stop18h 20m

Cardiff Wales

Mon 3/11

17:15-16:05

1 stop27h 50m

£606

Flights are sorted by cheapest return flights first.

Deals found on 15/9

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 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.

  • What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Cardiff?

    Currently, July is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Cardiff (average of £169). Flying from Washington, D.C. Dulles Intl Airport to Cardiff in December is currently the most expensive (average of £263). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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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