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Cardiff

$353+ 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 7/7. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — CWL
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$821
(KLM)

One-way from

$353
(Kiwi.com)
From Washington, D.C. Dulles Intl to Cardiff Wales
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One-way flight 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 June 12, 2025.

This KLM deal was found by Cheapflights users on 6/10. 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.
Fri 10/316:35 pmIAD - CWL
1 stop18h 20mKLM
Mon 11/35:25 pmCWL - IAD
1 stop27h 20mKLM
Deal found 6/10$821
This Delta deal was found by Cheapflights users on 6/11. 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.
Wed 8/209:50 amIAD - CWL
2 stops18h 25mDelta
Wed 8/279:50 amCWL - IAD
1 stop10h 45mDelta
Deal found 6/11$826
This Gurufare deal was found by Cheapflights users on 6/9. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1810:40 pmIAD - CWL
2 stops31h 50mAer Lingus
Tue 9/3012:00 pmCWL - IAD
2 stops37h 15mAer Lingus
Deal found 6/9$1,019
This Air France deal was found by Cheapflights users on 6/10. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/295:25 pmIAD - CWL
1 stop10h 45mMultiple Airlines
Mon 9/19:50 amCWL - IAD
2 stops18h 05mMultiple Airlines
Deal found 6/10$1,056
This Virgin Atlantic deal was found by Cheapflights users on 6/10. 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 11/2612:30 pmIAD - CWL
2 stops16h 20mVirgin Atlantic
Sun 11/305:25 pmCWL - IAD
1 stop27h 20mVirgin Atlantic
Deal found 6/10$1,107
This oojo deal was found by Cheapflights users on 6/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/145:05 pmIAD - CWL
2 stops42h 40mITA Airways
Sat 6/219:45 amCWL - IAD
2 stops33h 55mITA Airways
Deal found 6/10$2,682

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 June 12, 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

Fri 10/31

6:35 pm-9:50 am

1 stop11h 15m

Cardiff Wales

Mon 11/3

5:25 pm-3:45 pm

1 stop27h 20m

$821

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 8/20

9:50 am-9:15 am

2 stops18h 25m

Cardiff Wales

Wed 8/27

9:50 am-3:35 pm

1 stop10h 45m

$826

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Thu 9/18

10:40 pm-11:30 am

2 stops31h 50m

Cardiff Wales

Tue 9/30

12:00 pm-8:15 pm

2 stops37h 15m

$1,019

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 8/29

5:25 pm-9:10 am

1 stop10h 45m

Cardiff Wales

Mon 9/1

9:50 am-10:55 pm

2 stops18h 05m

$1,056

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 11/26

12:30 pm-9:50 am

2 stops16h 20m

Cardiff Wales

Sun 11/30

5:25 pm-3:45 pm

1 stop27h 20m

$1,107

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mon 7/7

9:58 pm-7:25 am

3 stops52h 27m

$353

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sat 7/26

5:25 pm-4:50 pm

1 stop18h 25m

$496

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mon 7/7

5:25 pm-4:45 pm

1 stop18h 20m

$576

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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.

Cheapflights Insights

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

Rainfall in Cardiff by month

Plan your trip to Cardiff by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Cardiff ranges from 2.0 - 3.5 inches per month. January is typically the wettest month, when rainfall can reach 3.5 in. April is typically the driest time to visit Cardiff when rainfall is around 2.0 in.

Temperature in Cardiff by month

Plan your trip to Cardiff by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Cardiff, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 64.4 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 39.2 F).

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 June 12, 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Virgin Atlantic from Washington, D.C. to Cardiff to help guide your decision. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Virgin Atlantic
7.4
Good
652 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Aer Lingus
7.1
Good
1,117 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 are the cheapest airlines flying 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 $821 on this airline. Additional options worth looking into are Delta and Aer Lingus, starting at $826 and $1,019 round-trip.

  • 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 Washington, D.C. Dulles Intl Airport?

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$740Average$791FlexibilityNo cancel feeOn-time75%

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