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Cardiff

$375+ Cheap flights from Dulles Intl (IAD) to Cardiff (CWL)

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 6/15. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — CWL
May 9 — May 161
Sat 5/9
Sat 5/16
1 adult, Economy
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Cheap 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 April 9, 2026.

This Mytrip deal was found by Cheapflights users on 4/8. 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 6/38:18 am
IAD
-
CWL
2 stops20h 57m
Multiple Airlines
Thu 6/1110:50 pm
CWL
-
IAD
2 stops26h 39m
Multiple Airlines
Deal found 4/8$900
This Kiwi.com deal was found by Cheapflights users on 4/7. 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 6/511:30 am
IAD
-
CWL
1 stop17h 45m
Multiple Airlines
Sun 6/149:35 am
CWL
-
IAD
2 stops38h 40m
Multiple Airlines
Deal found 4/7$943
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Sun 5/108:30 pm
IAD
-
CWL
2 stops32h 20m
Multiple Airlines
Mon 5/2511:35 am
CWL
-
IAD
1 stop28h 11m
Multiple Airlines
Deal found 4/8$955
This Mytrip deal was found by Cheapflights users on 4/4. 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 5/193:45 pm
IAD
-
CWL
3 stops26h 20m
Multiple Airlines
Tue 5/2611:15 pm
CWL
-
IAD
3 stops26h 14m
Multiple Airlines
Deal found 4/4$976
This Kiwi.com deal was found by Cheapflights users on 4/6. 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.
Mon 5/188:55 pm
IAD
-
CWL
1 stop20h 55m
Multiple Airlines
Mon 5/2510:10 pm
CWL
-
IAD
2 stops46h 11m
Multiple Airlines
Deal found 4/6$1,019
This Kiwi.com deal was found by Cheapflights users on 4/7. 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.
Wed 5/68:55 pm
IAD
-
CWL
1 stop20h 30m
Multiple Airlines
Wed 5/1311:30 pm
CWL
-
IAD
2 stops40h 16m
Multiple Airlines
Deal found 4/7$1,054
This Mytrip deal was found by Cheapflights users on 4/8. 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.
Fri 5/811:20 pm
IAD
-
CWL
3 stops31h 10m
Multiple Airlines
Fri 5/1510:45 pm
CWL
-
IAD
3 stops27h 40m
Multiple Airlines
Deal found 4/8$1,070

Find 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 April 9, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$900
(Mytrip)

One-way from

$375
(Mytrip)
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Cardiff Wales flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Cardiff Wales flights.
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From Washington, D.C. Dulles Intl to Cardiff Wales
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Cardiff Wales
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Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated April 9, 2026.
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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Tue 5/19

3:45 pm-11:05 pm

3 stops26h 20m

Cardiff Wales

Tue 5/26

11:35 am-8:29 pm

1 stop13h 54m

$1,032

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mon 5/4

6:10 pm-9:15 am

1 stop10h 05m

Cardiff Wales

Mon 5/11

5:15 pm-3:35 pm

1 stop27h 20m

$1,124

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 5/10

8:30 pm-9:15 am

3 stops31h 45m

Cardiff Wales

Mon 5/25

11:35 am-7:44 am

2 stops25h 09m

$1,143

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mon 5/18

5:15 pm-10:50 pm

1 stop24h 35m

Cardiff Wales

Mon 5/25

10:10 pm-3:45 pm

1 stop22h 35m

$1,168

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 5/6

6:10 pm-4:45 pm

1 stop17h 35m

Cardiff Wales

Wed 5/13

9:45 am-3:35 pm

1 stop10h 50m

$1,174

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 5/22

6:00 am-10:15 am

2 stops23h 15m

Cardiff Wales

Fri 5/29

10:45 pm-8:29 pm

3 stops26h 44m

$1,195

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 5/10

7:33 pm-4:45 pm

2 stops40h 12m

Cardiff Wales

Mon 5/25

9:45 am-10:56 pm

2 stops42h 11m

$1,218
Quickest round-trip

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 4/29

6:10 pm-4:45 pm

1 stop17h 35m

Cardiff Wales

Sun 5/3

9:50 am-3:35 pm

1 stop10h 45m

$1,284

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 4/22

12:45 pm-9:15 am

2 stops15h 30m

Cardiff Wales

Sun 4/26

5:15 pm-3:35 pm

1 stop27h 20m

$1,289

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 4/29

12:45 pm-9:15 am

2 stops15h 30m

Cardiff Wales

Sun 5/3

9:50 am-9:05 pm

2 stops16h 15m

$1,298

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/8

Showing 1-10 of 14 resultsSorted by cheapest first
1
2

Compare providers for flights from Dulles Intl to Cardiff

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to Cardiff in April.
ProviderPrice AccuracyTrust Score*
OvagoPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Cardiff flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-Cardiff flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Cardiff flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Cardiff flights, Cheapflights users trust FlightHub the most. FlightHub 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 Washington, D.C. Dulles Intl Airport-Cardiff 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 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 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 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?

    For a flight from Washington, D.C. Dulles Intl to Cardiff, you will be flying into 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 inbound flights from Washington, D.C. Dulles Intl per day. 0 airlines have flights to Cardiff Wales from Washington, D.C. Dulles Intl on a regular basis.

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

    For as low as $1,124, KLM can have you in Cardiff from Washington, D.C. Dulles Intl Airport in 10h 05m. The distance from Washington, D.C. Dulles Intl Airport to Cardiff is about 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 vacation 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.

See more FAQs

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