HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Dulles Intl

$813+ Cheap flights from Cardiff (CWL) to Dulles Intl (IAD)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/3. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — IAD
May 23 — May 301
Sat 5/23
Sat 5/30
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Cardiff to Dulles Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Cardiff to Dulles Intl

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 April 23, 2026.

This Mytrip deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/311:30 pm
CWL
-
IAD
3 stops25h 59m
Multiple Airlines
Wed 6/108:18 am
IAD
-
CWL
2 stops20h 57m
Multiple Airlines
Deal found 4/19$813
This Mytrip deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1911:15 pm
CWL
-
IAD
3 stops27h 10m
Multiple Airlines
Tue 5/264:05 pm
IAD
-
CWL
2 stops26h 00m
Multiple Airlines
Deal found 4/21$870
This Mytrip deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/411:35 am
CWL
-
IAD
1 stop13h 54m
Multiple Airlines
Thu 6/119:55 am
IAD
-
CWL
2 stops31h 25m
Multiple Airlines
Deal found 4/20$1,031
This Kiwi.com deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1810:45 pm
CWL
-
IAD
1 stop22h 00m
Multiple Airlines
Thu 9/248:45 pm
IAD
-
CWL
1 stop20h 35m
Multiple Airlines
Deal found 4/22$1,086
This Delta deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/189:45 am
CWL
-
IAD
1 stop10h 50m
Delta
Thu 9/241:00 pm
IAD
-
CWL
2 stops15h 15m
Delta
Deal found 4/22$1,147

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 April 23, 2026.

Most accurate provider

Expedia
1 star

Most trusted provider

Expedia
3 stars

Round-trip from

$813
(Mytrip)
Provider with most accurate pricing for Cardiff Wales-Washington, D.C. Dulles Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Cardiff Wales-Washington, D.C. Dulles Intl flights.
Search Deals
From Cardiff Wales to Washington, D.C. Dulles Intl
Search Deals

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated April 23, 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 round-trip

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Wed 6/3

11:30 pm-8:29 pm

3 stops25h 59m

Washington, D.C. Dulles Intl

Wed 6/10

8:18 am-10:15 am

2 stops20h 57m

$813

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Tue 5/19

11:15 pm-9:25 pm

3 stops27h 10m

Washington, D.C. Dulles Intl

Tue 5/26

4:05 pm-11:05 pm

2 stops26h 00m

$870

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Thu 6/4

11:35 am-8:29 pm

1 stop13h 54m

Washington, D.C. Dulles Intl

Thu 6/11

9:55 am-10:20 pm

2 stops31h 25m

$1,031

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Fri 9/18

10:45 pm-3:45 pm

1 stop22h 00m

Washington, D.C. Dulles Intl

Thu 9/24

8:45 pm-10:20 pm

1 stop20h 35m

$1,086
Quickest round-trip

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Fri 9/18

9:45 am-3:35 pm

1 stop10h 50m

Washington, D.C. Dulles Intl

Thu 9/24

1:00 pm-9:15 am

2 stops15h 15m

$1,147

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Fri 9/18

9:45 am-12:10 am

2 stops19h 25m

Washington, D.C. Dulles Intl

Thu 9/24

6:00 am-9:15 am

2 stops22h 15m

$1,153

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/19

Sorted by cheapest first
  • Most accurate provider: When it comes to deals on Cardiff-Washington, D.C. Dulles Intl Airport flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Cardiff-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. Expedia <90% of the time. Price accuracy is based on data collected from Cardiff-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Cardiff-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Cardiff-Washington, D.C. Dulles Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 round-trip 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?

    Cardiff Wales (CWL) is the airport you will fly out of if you book a flight from Cardiff to Washington, D.C. Dulles Intl. You should not have trouble finding flights to Washington, D.C. Dulles Intl from Cardiff Wales; the airport handles an average of 0 outbound flights to Washington, D.C. Dulles Intl per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Cardiff airport to Washington, D.C. Dulles Intl. It is only a 9.1 mi journey to Cardiff Wales (CWL) from Cardiff’s city center.

  • 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 vacation 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

Traveling 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
Alexandria
Tysons
Owings Mills
Springfield
Arlington
Woodbridge
Silver Spring
Herndon
Rockville
Hyattsville
Fredericksburg
Hanover
Laurel
Manassas
Largo
Upper Marlboro
Waldorf
Bowie
Clinton
Hunt Valley

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.

Alternative routes for Cardiff to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Manchester to Dulles Intl flights
Manchester to Reagan-National flights
Manchester to Baltimore flights
Bristol to Dulles Intl flights

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.