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$248+ Cheap flights from Washington 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 7/14. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CWL
Jul 1 — Jul 81
Tue 7/1
Tue 7/8
1 adult, Economy
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Cheap flight deals from Washington to Cardiff

Keep the following information in mind while searching for Washington to Cardiff flight deals. Data was last updated June 26, 2025.

Round-trip from

$1,022
(KLM)

One-way from

$248
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$1,693
From Washington to Cardiff Wales
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One-way flight from Washington to Cardiff Wales
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Highest demand for flights based on searches. 21% potential increase in price ($319 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($55 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Washington to Cardiff

Cheapest flights from Washington to Cardiff
Explore the most affordable flight options available from Washington to Cardiff. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 26, 2025.

This KLM deal was found by Cheapflights users on 6/25. 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.
Sat 9/132:10 pmSEA - CWL
1 stop35h 05mKLM
Fri 9/199:50 amCWL - SEA
1 stop33h 55mKLM
Deal found 6/25$1,022
This Air France deal was found by Cheapflights users on 6/26. 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.
Sun 8/105:40 pmSEA - CWL
1 stop15h 05mAir France
Sun 8/179:50 amCWL - SEA
2 stops18h 29mAir France
Deal found 6/26$1,080
This Delta deal was found by Cheapflights users on 6/26. 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.
Sun 8/106:10 amSEA - CWL
2 stops19h 05mDelta
Sun 8/179:50 amCWL - SEA
2 stops21h 57mDelta
Deal found 6/26$1,084
This Mytrip deal was found by Cheapflights users on 6/26. 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.
Sun 8/105:30 amSEA - CWL
3 stops23h 15mMultiple Airlines
Sun 8/1711:00 amCWL - SEA
3 stops41h 28mMultiple Airlines
Deal found 6/26$1,087
This Gurufare deal was found by Cheapflights users on 6/26. 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.
Sat 9/138:20 pmSEA - CWL
2 stops31h 10mAer Lingus
Fri 9/199:00 amCWL - SEA
2 stops17h 20mAer Lingus
Deal found 6/26$1,569

Cheapflights Fare Finder

Customize your flight search to find flights from Washington 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 26, 2025.
Use the filters below to find and compare flights from Washington to Cardiff that are best for you.

Fly from

Washington

Fly to

Cardiff

Route

Depart

Return

Price

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sat 9/13

2:10 pm-9:15 am

1 stop35h 05m

Cardiff Wales

Fri 9/19

9:50 am-11:45 am

1 stop33h 55m

$1,022

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sun 8/10

5:40 pm-4:45 pm

1 stop15h 05m

Cardiff Wales

Sun 8/17

9:50 am-8:19 pm

2 stops18h 29m

$1,080

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sun 8/10

6:10 am-9:15 am

2 stops19h 05m

Cardiff Wales

Sun 8/17

9:50 am-11:47 pm

2 stops21h 57m

$1,084

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sun 8/10

5:30 am-12:45 pm

3 stops23h 15m

Cardiff Wales

Sun 8/17

11:00 am-8:28 pm

3 stops41h 28m

$1,087

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sat 9/13

8:20 pm-11:30 am

2 stops31h 10m

Cardiff Wales

Fri 9/19

9:00 am-6:20 pm

2 stops17h 20m

$1,569

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Mon 7/14

3:45 pm-3:55 pm

2 stops16h 10m

$248

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Tue 12/23

3:00 pm-9:50 am

1 stop34h 50m

$671

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Mon 12/22

10:55 pm-4:55 pm

2 stops34h 00m

$675

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/25

Best time to book a flight from Washington to Cardiff

Have a flexible travel schedule? Discover the best time to fly to Cardiff from Washington 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 to Cardiff

What is the cheapest time of day to fly from WA to CWL?

Find hourly flight availability from Washington to Cardiff. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 26, 2025.

When flying from State of Washington to Cardiff, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 26, 2025.
Read through reviews of airlines operating flights from Washington to Cardiff, such as Delta, KLM, and Air France. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,963 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

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
7,963 reviews
Delta
8.0
Very good
7,963 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

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
1,365 reviews
Delta
8.0
Very good
7,963 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

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!
Air France
7.5
Good
1,470 reviews
Delta
8.0
Very good
7,963 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

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
1,131 reviews
Delta
8.0
Very good
7,963 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

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 Washington 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?

    Located just 9.1 mi from the city center, Cardiff Wales (CWL) is the airport most travelers will use when flying to Cardiff from Washington.

  • Can I find deals for flights from Washington to Cardiff that include hotel bookings?

    Yes. In addition to deals on Washington to Cardiff flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to Cardiff?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Cardiff.

  • Can I find deals for business class flights from Washington to Cardiff?

    Yes. Cheapflights offers flight deals from Washington 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 State of Washington to Cardiff?

    Currently, February is the cheapest month in which you can book a flight from State of Washington to Cardiff (average of $773). Flying from State of Washington 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

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Top airline flying from Washington to Cardiff

Discover the top airline that operate flights from Washington 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 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$760Average$1,132FlexibilityNo cancel feeOn-time75%

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