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Cheap flights from Cardiff to Washington, D.C. Dulles Intl Airport from £598

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 26/2. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — IAD
27 12월 — 3 1월1
1 adult
1 adult, Economy, 0 bags

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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 27 11월 2025.

금 26/1210:20CWL - IAD
2 stops17h 48mMultiple Airlines
금 2/118:05IAD - CWL
1 stop10h 45mMultiple Airlines
Deal found 26/11£951
금 26/1217:15CWL - IAD
1 stop27h 50mKLM
금 2/118:05IAD - CWL
1 stop10h 45mKLM
Deal found 26/11£971
금 26/1210:20CWL - IAD
2 stops17h 48mDelta
금 2/110:57IAD - CWL
2 stops17h 53mDelta
Deal found 26/11£1,145

Cheap 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 27 11월 2025.

Round-trip from

£598
British Airways
  • British Airways
  • 26/2-2/3
  • 4 total stops
  • 89h 20m total
  • Cardiff to Washington, D.C.
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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 27 11월 2025.
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

Cardiff

Fly to

Dulles Intl

Route

Depart

Return

Price

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

목 26/2

08:35-15:35

2 stops36h 00m

Washington, D.C. Dulles Intl

월 2/3

21:45-08:05

2 stops53h 20m

£598

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

목 26/2

10:20-19:09

2 stops13h 49m

Washington, D.C. Dulles Intl

월 2/3

18:05-16:55

1 stop17h 50m

£623

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

토 10/1

17:25-11:43

2 stops47h 18m

Washington, D.C. Dulles Intl

토 17/1

19:49-09:50

2 stops33h 01m

£670

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

토 10/1

10:20-19:09

2 stops13h 49m

Washington, D.C. Dulles Intl

토 17/1

18:05-16:50

1 stop17h 45m

£684

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

금 9/1

10:20-15:35

3 stops34h 15m

Washington, D.C. Dulles Intl

금 16/1

17:05-09:45

3 stops35h 40m

£732

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

토 10/1

17:25-16:05

1 stop27h 40m

Washington, D.C. Dulles Intl

토 17/1

18:05-09:45

1 stop10h 40m

£761

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

금 9/1

17:15-16:05

1 stop27h 50m

Washington, D.C. Dulles Intl

금 16/1

12:18-09:50

2 stops16h 32m

£773

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

토 10/1

20:05-21:00

2 stops29h 55m

Washington, D.C. Dulles Intl

토 17/1

17:30-09:50

3 stops35h 20m

£808

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

목 26/2

17:25-16:05

1 stop27h 40m

Washington, D.C. Dulles Intl

월 2/3

18:05-09:50

1 stop10h 45m

£816

Flights are sorted by cheapest return flights first.

Deals found on 24/11

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.

Cheapflights Insights

Everything you need to know about your flight from Cardiff to Washington, D.C. Dulles Intl Airport

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

Currently, November is the cheapest month in which you can book a flight from Cardiff to Washington, D.C. Dulles Intl Airport (average of £521). Flying from Cardiff to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £817). 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.

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 British Airways, Delta, and Virgin Atlantic fly from Cardiff to Washington, D.C. Dulles Intl Airport in about 13h 49m. The time it takes to get you to your destination can typically vary by up to 33h 29m. There are 3548 mi between Cardiff and Washington, D.C. Dulles Intl Airport. Both multi-stop and direct flights can be found to your destination and back.

  • 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.

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

    Currently, November is the cheapest month in which you can book a flight from Cardiff to Washington, D.C. Dulles Intl Airport (average of £521). Flying from Cardiff to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £817). 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 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
Hanover
Oxon Hill
Woodbridge
Arlington
Alexandria
College Park

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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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