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Cheap flights from Washington to Cardiff from £299

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 2/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CWL
8 Sep — 15 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap 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 9 August 2026.

Sat 5/919:10 -
1 stop18h 10m
Sat 12/911:35 -
2 stops30h 05m
Deal found 6/8£803
Mon 10/819:10 -
1 stop19h 40m
Mon 17/822:10 -
2 stops43h 30m
Deal found 8/8£878
Tue 1/907:15 -
2 stops18h 00m
Tue 8/909:45 -
1 stop14h 50m
Deal found 5/8£888
Mon 10/817:45 -
1 stop15h 00m
Mon 17/809:45 -
1 stop33h 52m
Deal found 5/8£900
Sat 5/907:15 -
2 stops18h 00m
Sat 12/909:45 -
2 stops20h 18m
Deal found 7/8£903
Fri 4/915:59 -
2 stops33h 16m
Sat 12/909:45 -
1 stop14h 50m
Deal found 6/8£908
Fri 4/917:45 -
1 stop31h 30m
Fri 11/909:45 -
1 stop14h 50m
Deal found 6/8£916
Thu 20/819:10 -
1 stop27h 45m
Thu 27/822:50 -
2 stops27h 55m
Deal found 8/8£920
Fri 21/813:50 -
1 stop19h 15m
Fri 28/809:45 -
1 stop14h 42m
Deal found 6/8£922
Thu 20/813:50 -
1 stop18h 55m
Thu 27/809:45 -
1 stop14h 42m
Deal found 8/8£922

Find flight deals from Washington to Cardiff

Keep the following information in mind while searching for Washington to Cardiff flight deals. Data was last updated 9 August 2026.

Round-trip from

£803

One-way from

£299
WestJet
  • WestJet
  • 5/9-12/9
  • 3 total stops
  • 48h 15m total
  • Washington to Cardiff
Search Deals
2/9
  • 2/9
  • 3 total stops
  • 43h 20m total
  • Washington to Cardiff
Search Deals

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 9 August 2026.
Use the filters below to find and compare flights from Washington to Cardiff that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SeattleCardiff

SEA Seattle/Tacoma Intl - CWL Cardiff Wales

SEACWL

Seattle/Tacoma Intl

Tue 1/9

07:15-09:15

2 stops18h 00m

Cardiff Wales

Tue 8/9

09:45-16:35

1 stop14h 50m

£888

SeattleCardiff

SEA Seattle/Tacoma Intl - CWL Cardiff Wales

SEACWL

Seattle/Tacoma Intl

Sat 5/9

07:15-09:15

2 stops18h 00m

Cardiff Wales

Sat 12/9

09:45-22:03

2 stops20h 18m

£903

SeattleCardiff

SEA Seattle/Tacoma Intl - CWL Cardiff Wales

SEACWL

Seattle/Tacoma Intl

Fri 4/9

17:45-09:15

1 stop31h 30m

Cardiff Wales

Fri 11/9

09:45-16:35

1 stop14h 50m

£916

SeattleCardiff

SEA Seattle/Tacoma Intl - CWL Cardiff Wales

SEACWL

Seattle/Tacoma Intl

Thu 20/8

19:10-06:55

1 stop27h 45m

Cardiff Wales

Thu 27/8

22:50-18:45

2 stops27h 55m

£920

SeattleCardiff

SEA Seattle/Tacoma Intl - CWL Cardiff Wales

SEACWL

Seattle/Tacoma Intl

Thu 20/8

13:50-16:45

1 stop18h 55m

Cardiff Wales

Thu 27/8

09:45-16:27

1 stop14h 42m

£922
Fastest return journey

SeattleCardiff

SEA Seattle/Tacoma Intl - CWL Cardiff Wales

SEACWL

Seattle/Tacoma Intl

Fri 21/8

08:59-09:15

2 stops16h 16m

Cardiff Wales

Fri 28/8

09:45-16:27

1 stop14h 42m

£925

SeattleCardiff

SEA Seattle/Tacoma Intl - CWL Cardiff Wales

SEACWL

Seattle/Tacoma Intl

Sat 22/8

10:50-09:15

2 stops38h 25m

Cardiff Wales

Sat 29/8

09:50-11:37

1 stop33h 47m

£936
Cheapest one-way

SeattleCardiff

SEA Seattle/Tacoma Intl - CWL Cardiff Wales

SEACWL

Seattle/Tacoma Intl

Wed 2/9

19:00-22:20

3 stops43h 20m

£299
Fastest single journey

SeattleCardiff

SEA Seattle/Tacoma Intl - CWL Cardiff Wales

SEACWL

Seattle/Tacoma Intl

Wed 2/9

07:15-09:15

2 stops18h 00m

£399

Flights are sorted by cheapest return flights first.

Deals found on 6/8

Sorted by cheapest first

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. Delta provides one of the quickest options available for as low as £888. There are 4709 mi between State of Washington and Cardiff.

  • 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
Bridgend
Barry

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Fly with Cheapflights

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How does Cheapflights help users find flights from Washington to Cardiff?

When you search for this flight from Washington to Cardiff, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Washington to Cardiff?

Millions of users choose and trust Cheapflights to book the best flight deals from Washington to Cardiff for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Washington to Cardiff with no change fees?

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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Of course! You can now track prices for flights from Washington to Cardiff and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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