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Cheap flights from Washington to Cardiff from £567

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CWL
15 Feb — 22 Feb1
1 adult
1 adult, Economy, 0 bags

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 16 January 2026.

Round-trip from

£567
KLM
  • KLM
  • 1/3-8/3
  • 2 total stops
  • 68h 00m total
  • Washington to Cardiff
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Find flight deals from Washington to Cardiff

Enter your travel dates to find the best prices.

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 16 January 2026.

Sun 1/315:05
SEA
-
CWL
1 stop34h 45m
KLM
Sun 8/310:20
CWL
-
SEA
1 stop33h 15m
KLM
Deal found 14/1£567
Sun 1/307:10
SEA
-
CWL
2 stops18h 40m
Delta
Sun 8/310:20
CWL
-
SEA
2 stops19h 00m
Delta
Deal found 14/1£578
Thu 23/417:30
SEA
-
CWL
1 stop31h 45m
KLM
Thu 30/409:45
CWL
-
SEA
1 stop14h 45m
KLM
Deal found 14/1£612
Thu 23/407:15
SEA
-
CWL
2 stops18h 00m
Delta
Thu 30/409:45
CWL
-
SEA
1 stop14h 45m
Delta
Deal found 14/1£616
Tue 23/607:05
SEA
-
CWL
2 stops43h 10m
WestJet
Tue 30/611:35
CWL
-
SEA
2 stops40h 53m
WestJet
Deal found 14/1£786
Thu 4/607:05
SEA
-
CWL
2 stops43h 10m
WestJet
Tue 9/611:35
CWL
-
SEA
2 stops40h 53m
WestJet
Deal found 15/1£799
Tue 23/617:35
SEA
-
CWL
1 stop15h 10m
KLM
Tue 30/609:45
CWL
-
SEA
1 stop14h 39m
KLM
Deal found 14/1£996
Tue 23/613:45
SEA
-
CWL
2 stops19h 00m
Delta
Tue 30/609:45
CWL
-
SEA
1 stop14h 39m
Delta
Deal found 14/1£1,000
Tue 23/617:35
SEA
-
CWL
1 stop31h 40m
Multiple Airlines
Tue 30/609:45
CWL
-
SEA
2 stops20h 20m
Multiple Airlines
Deal found 15/1£1,004

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 16 January 2026.
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

Sun 1/3

15:05-09:50

1 stop34h 45m

Cardiff Wales

Sun 8/3

10:20-12:35

1 stop33h 15m

£567

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sun 1/3

07:10-09:50

2 stops18h 40m

Cardiff Wales

Sun 8/3

10:20-22:20

2 stops19h 00m

£578

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Thu 23/4

17:30-09:15

1 stop31h 45m

Cardiff Wales

Thu 30/4

09:45-16:30

1 stop14h 45m

£612

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Thu 23/4

07:15-09:15

2 stops18h 00m

Cardiff Wales

Thu 30/4

09:45-16:30

1 stop14h 45m

£616

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Tue 23/6

07:05-10:15

2 stops43h 10m

Cardiff Wales

Tue 30/6

11:35-20:28

2 stops40h 53m

£786

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Thu 4/6

07:05-10:15

2 stops43h 10m

Cardiff Wales

Tue 9/6

11:35-20:28

2 stops40h 53m

£799

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Tue 23/6

17:35-16:45

1 stop15h 10m

Cardiff Wales

Tue 30/6

09:45-16:24

1 stop14h 39m

£996

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Tue 23/6

13:45-16:45

2 stops19h 00m

Cardiff Wales

Tue 30/6

09:45-16:24

1 stop14h 39m

£1,000

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Tue 23/6

17:35-09:15

1 stop31h 40m

Cardiff Wales

Tue 30/6

09:45-22:05

2 stops20h 20m

£1,004

Flights are sorted by cheapest return flights first.

Deals found on 14/1

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 return 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
No data available for this route at this time. Please check back soon.

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?

    Cardiff Wales (CWL), located 9.1 mi from the city center, is the airport you fly into when you book flights from Washington to Cardiff.

  • How long is the flight from State of Washington to Cardiff?

    A quick flight from State of Washington to Cardiff can take about 18h 40m. KLM provides one of the quickest options available for as low as £578. There are 4709 mi between State of Washington and Cardiff. This flight may include one or multiple stops.

  • 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 holiday 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.

See more FAQs

Travelling to a place near Cardiff?

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

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Cheapflights does show flights with no change fees to all users. To see these options for flights from Washington to Cardiff, users can toggle the no change fees filter when performing a flight search.

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