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Cardiff

$714+ Cheap flights from Dulles Intl (IAD) to Cardiff (CWL)

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 9/28. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — CWL
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheap 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 August 14, 2025.

Round-trip from

$714
(Kiwi.com)
From Washington, D.C. Dulles Intl to Cardiff Wales
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Find 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 August 14, 2025.

This Kiwi.com deal was found by Cheapflights users on 8/14. 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 9/288:25 pmIAD - CWL
1 stop11h 20mMultiple Airlines
Sun 10/511:00 amCWL - IAD
1 stop12h 55mMultiple Airlines
Deal found 8/14$714
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 9/145:20 pmIAD - CWL
1 stop14h 25mMultiple Airlines
Sun 9/2111:00 amCWL - IAD
1 stop12h 55mMultiple Airlines
Deal found 8/14$817
This Kiwi.com deal was found by Cheapflights users on 8/13. 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.
Sat 9/275:20 pmIAD - CWL
1 stop12h 15mMultiple Airlines
Sat 10/49:00 amCWL - IAD
2 stops16h 20mMultiple Airlines
Deal found 8/13$852
This KLM deal was found by Cheapflights users on 8/14. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/135:25 pmIAD - CWL
1 stop10h 50mKLM
Wed 10/229:50 amCWL - IAD
1 stop10h 45mKLM
Deal found 8/14$936
This KLM deal was found by Cheapflights users on 8/13. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/145:25 pmIAD - CWL
1 stop10h 50mKLM
Wed 8/279:50 amCWL - IAD
2 stops14h 53mKLM
Deal found 8/13$942
This Delta deal was found by Cheapflights users on 8/14. 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 8/155:25 pmIAD - CWL
1 stop10h 50mDelta
Thu 8/289:50 amCWL - IAD
2 stops14h 53mDelta
Deal found 8/14$946
This Virgin Atlantic deal was found by Cheapflights users on 8/13. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1211:00 amIAD - CWL
2 stops17h 50mVirgin Atlantic
Sun 11/165:30 pmCWL - IAD
2 stops28h 01mVirgin Atlantic
Deal found 8/13$950
This KLM deal was found by Cheapflights users on 8/14. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/91:00 pmIAD - CWL
2 stops15h 15mKLM
Mon 9/159:50 amCWL - IAD
2 stops14h 47mKLM
Deal found 8/14$951

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 August 14, 2025.
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

Dulles Intl

Fly to

Cardiff

Route

Depart

Return

Price

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 9/28

8:25 pm-12:45 pm

1 stop11h 20m

Cardiff Wales

Sun 10/5

11:00 am-6:55 pm

1 stop12h 55m

$714

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 9/26

5:00 pm-4:20 pm

2 stops18h 20m

Cardiff Wales

Fri 10/3

8:55 pm-3:20 pm

2 stops23h 25m

$812

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 9/14

5:20 pm-12:45 pm

1 stop14h 25m

Cardiff Wales

Sun 9/21

11:00 am-6:55 pm

1 stop12h 55m

$817

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sat 9/27

5:20 pm-10:35 am

1 stop12h 15m

Cardiff Wales

Sat 10/4

9:00 am-8:20 pm

2 stops16h 20m

$852

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 9/26

5:25 pm-9:10 am

1 stop10h 45m

Cardiff Wales

Fri 10/3

9:50 am-3:35 pm

1 stop10h 45m

$908

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 8/24

5:25 pm-4:45 pm

1 stop18h 20m

Cardiff Wales

Sun 9/7

9:50 am-3:35 pm

1 stop10h 45m

$935

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Tue 9/23

5:25 pm-4:45 pm

1 stop18h 20m

Cardiff Wales

Thu 10/9

9:50 am-3:35 pm

1 stop10h 45m

$936

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 9/28

5:50 pm-11:30 am

2 stops12h 40m

$789

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

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.

Reviews of airlines servicing Cardiff

Get insights into the airlines that provide service to Cardiff. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Cardiff. Reviews last updated August 14, 2025.
Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Cardiff, such as KLM. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,381 reviews

Crew

8.4

Boarding

7.8

Food

7.3

Overall

7.8

Entertainment

7.1

Comfort

7.7

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
KLM
7.8
Good
1,381 reviews
KLM
7.8
Good
1,381 reviews

Crew

8.4

Boarding

7.8

Food

7.3

Overall

7.8

Entertainment

7.1

Comfort

7.7

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

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. 1 airline has flights to Cardiff Wales from Washington, D.C. Dulles Intl on a regular basis.

  • What is the cheapest airline to fly from Washington, D.C. Dulles Intl Airport to Cardiff round-trip?

    Our cheapest airline available from Washington, D.C. Dulles Intl Airport to Cardiff is KLM. Our recent data shows that you can find tickets from as low as $765 on this airline.

  • 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.

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

    Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Cardiff (average of $773). Flying from Washington, D.C. Dulles Intl Airport to Cardiff in June is currently the most expensive (average of $1,622). 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

Traveling to a place near Cardiff?

Book flights to Cardiff if you plan to visit one of these locations
Barry

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Top airline flying from Dulles Intl to Cardiff

Discover the top airline that operate flights from Dulles Intl to Cardiff. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$765Average$791FlexibilityNo cancel feeOn-time75%

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