Find flights
When to book
FAQs

Cheap flights from Cardiff to Washington, D.C. Dulles Intl Airport from £356

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 16/6. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — IAD
10 Feb — 17 Feb1
1 adult
1 adult, Economy, 0 bags

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 11 January 2026.

Round-trip from

£550

One-way from

£356
Virgin Atlantic
  • Virgin Atlantic
  • 25/2-4/3
  • 3 total stops
  • 44h 06m total
  • Cardiff to Washington, D.C.
Search Deals
16/6
  • 16/6
  • 2 total stops
  • 26h 15m total
  • Cardiff to Washington, D.C.
Search Deals

Find 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 11 January 2026.

Wed 25/217:25CWL - IAD
1 stop27h 40mVirgin Atlantic
Wed 4/312:24IAD - CWL
2 stops16h 26mVirgin Atlantic
Deal found 11/1£550
Wed 25/210:20CWL - IAD
2 stops17h 49mKLM
Wed 4/312:35IAD - CWL
2 stops16h 15mKLM
Deal found 11/1£554
Wed 25/210:20CWL - IAD
3 stops33h 55mMultiple Airlines
Wed 4/318:00IAD - CWL
3 stops22h 30mMultiple Airlines
Deal found 11/1£618
Mon 15/612:00CWL - IAD
2 stops32h 50mBritish Airways
Tue 30/617:40IAD - CWL
2 stops12h 50mBritish Airways
Deal found 11/1£637
Mon 15/611:35CWL - IAD
2 stops16h 24mMultiple Airlines
Tue 30/617:15IAD - CWL
1 stop25h 10mMultiple Airlines
Deal found 11/1£723
Sat 14/317:25CWL - IAD
1 stop27h 40mVirgin Atlantic
Sun 22/319:05IAD - CWL
1 stop17h 40mVirgin Atlantic
Deal found 9/1£863

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 11 January 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

Cardiff

Fly to

Dulles Intl

Route

Depart

Return

Price

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Wed 25/2

17:25-16:05

1 stop27h 40m

Washington, D.C. Dulles Intl

Wed 4/3

12:24-09:50

2 stops16h 26m

£550

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Wed 25/2

10:20-23:09

2 stops17h 49m

Washington, D.C. Dulles Intl

Wed 4/3

12:35-09:50

2 stops16h 15m

£554

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Wed 25/2

10:20-15:15

3 stops33h 55m

Washington, D.C. Dulles Intl

Wed 4/3

18:00-21:30

3 stops22h 30m

£618

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 15/6

12:00-15:50

2 stops32h 50m

Washington, D.C. Dulles Intl

Tue 30/6

17:40-11:30

2 stops12h 50m

£637

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 15/6

11:35-22:59

2 stops16h 24m

Washington, D.C. Dulles Intl

Tue 30/6

17:15-23:25

1 stop25h 10m

£723

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sat 14/3

17:25-17:05

1 stop27h 40m

Washington, D.C. Dulles Intl

Sun 22/3

19:05-16:45

1 stop17h 40m

£863

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Tue 16/6

21:45-19:00

2 stops26h 15m

£356

Flights are sorted by cheapest return flights first.

Deals found on 10/1

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 £512). Flying from Cardiff to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £807). 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 Virgin Atlantic, KLM, and British Airways fly from Cardiff to Washington, D.C. Dulles Intl Airport in about 17h 49m. The time it takes to get you to your destination can typically vary by up to 15h 01m. 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 £512). Flying from Cardiff to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £807). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

When you search for this flight from Cardiff to Dulles Intl, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Cheapflights helps you find that perfect flight to Dulles Intl from Cardiff by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.