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Cheap flights from Cardiff to Washington, D.C. Dulles Intl Airport from £472

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 27/8. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — IAD
3 Aug — 10 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Cardiff to Dulles Intl

Enter your travel dates to find the best prices.

Cheapest flights from Cardiff to Dulles Intl
Explore the most affordable flight options available from Cardiff to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 July 2026.

Thu 27/822:50
CWL
-
IAD
2 stops27h 34m
Multiple Airlines
Mon 31/820:30
IAD
-
CWL
2 stops21h 20m
Multiple Airlines
Deal found 1/7£472
Tue 6/1016:15
CWL
-
IAD
2 stops32h 10m
Multiple Airlines
Tue 13/1021:05
IAD
-
CWL
1 stop21h 20m
Multiple Airlines
Deal found 1/7£599
Tue 18/823:15
CWL
-
IAD
3 stops27h 09m
Multiple Airlines
Tue 25/820:30
IAD
-
CWL
3 stops21h 20m
Multiple Airlines
Deal found 28/6£618
Tue 6/1009:45
CWL
-
IAD
2 stops19h 46m
Virgin Atlantic
Tue 13/1012:30
IAD
-
CWL
2 stops15h 45m
Virgin Atlantic
Deal found 1/7£633
Mon 26/1017:30
CWL
-
IAD
2 stops29h 40m
Virgin Atlantic
Mon 2/1117:08
IAD
-
CWL
2 stops35h 42m
Virgin Atlantic
Deal found 3/7£674
Mon 26/1017:30
CWL
-
IAD
1 stop27h 15m
KLM
Mon 2/1118:20
IAD
-
CWL
1 stop10h 30m
KLM
Deal found 3/7£680

Find flight deals from Cardiff to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Cardiff (CWL) to Dulles Intl (IAD). 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 4 July 2026.

Round-trip from

£472
27/8-31/8
  • 27/8-31/8
  • 4 total stops
  • 48h 54m total
  • Cardiff to Washington, D.C.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Cardiff to Dulles Intl 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 4 July 2026.
Use the filters below to find and compare flights from Cardiff to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Thu 27/8

22:50-21:24

2 stops27h 34m

Washington, D.C. Dulles Intl

Mon 31/8

20:30-22:50

2 stops21h 20m

£472

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Tue 18/8

23:15-21:24

3 stops27h 09m

Washington, D.C. Dulles Intl

Tue 25/8

20:30-22:50

3 stops21h 20m

£618

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Tue 6/10

09:45-00:31

2 stops19h 46m

Washington, D.C. Dulles Intl

Tue 13/10

12:30-09:15

2 stops15h 45m

£633

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 26/10

17:30-19:10

2 stops29h 40m

Washington, D.C. Dulles Intl

Mon 2/11

17:08-09:50

2 stops35h 42m

£674

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 26/10

17:30-16:45

1 stop27h 15m

Washington, D.C. Dulles Intl

Mon 2/11

18:20-09:50

1 stop10h 30m

£680

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Tue 6/10

21:45-19:00

2 stops26h 15m

Washington, D.C. Dulles Intl

Tue 13/10

08:15-23:25

3 stops34h 10m

£718
Fastest return journey

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Thu 27/8

09:45-15:35

1 stop10h 50m

Washington, D.C. Dulles Intl

Mon 31/8

18:10-09:15

1 stop10h 05m

£740
Cheapest one-way
Fastest single journey

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Wed 28/10

12:00-20:55

2 stops36h 55m

£528

Flights are sorted by cheapest return flights first.

Deals found on 28/6

Sorted by cheapest first

Best time to book a flight from Cardiff to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Cardiff 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 Cardiff to Dulles Intl. 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 from for flights from Cardiff to Washington, D.C. Dulles Intl?

    For a flight from Cardiff to Washington, D.C. Dulles Intl, you will be flying from Cardiff Wales. Cardiff Wales (CWL) is just 9.1 mi from the center of the city. Cardiff Wales is the only Cardiff airport and it handles 0 outbound flights to Washington, D.C. Dulles Intl per day. 0 airlines have flights to Washington, D.C. Dulles Intl from Cardiff Wales on a regular basis.

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

    Airlines like Virgin Atlantic fly from Cardiff to Washington, D.C. Dulles Intl Airport in about 19h 46m. The time it takes to get you to your destination can typically vary by up to . There are 3548 mi between Cardiff and Washington, D.C. Dulles Intl Airport.

  • Can I find deals for flights from Cardiff to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Cardiff to Dulles Intl flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Cardiff to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Cardiff to Dulles Intl.

  • Can I find deals for business class flights from Cardiff to Dulles Intl?

    Yes. Cheapflights offers flight deals from Cardiff to Dulles Intl 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 Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Silver Spring
Oxon Hill
Gaithersburg
Hanover
Woodbridge
Alexandria
Sterling

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How does Cheapflights help users find flights from Cardiff to Dulles Intl?

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Why should you use Cheapflights to find cheap flight tickets from Cardiff to Dulles Intl?

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

Need flexible booking options for your flight to Dulles Intl from Cardiff? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Cardiff to Dulles Intl become cheaper?

Not ready to book yet? You can track prices for flights from Cardiff to Dulles Intl on Cheapflights with our Price Alert feature and get notified when better prices are available.

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