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Cheap flights from Washington to Cardiff from £709

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 30/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CWL
6 Dec — 13 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Washington to Cardiff

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Best flights from Washington to Cardiff
Discover carefully curated flight deals from Washington to Cardiff that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 6 November 2025.

Thu 30/417:35SEA - CWL
1 stop31h 40mDelta
Mon 4/509:50CWL - SEA
1 stop33h 45mDelta
Deal found 3/11£709
Thu 30/415:35SEA - CWL
2 stops17h 10mVirgin Atlantic
Mon 4/509:50CWL - SEA
2 stops38h 28mVirgin Atlantic
Deal found 3/11£720

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 6 November 2025.

Round-trip from

£709
Delta
  • Delta
  • 30/4-4/5
  • 2 total stops
  • 65h 25m total
  • Washington to Cardiff
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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 6 November 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

Thu 30/4

17:35-09:15

1 stop31h 40m

Cardiff Wales

Mon 4/5

09:50-11:35

1 stop33h 45m

£709

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Thu 30/4

15:35-16:45

2 stops17h 10m

Cardiff Wales

Mon 4/5

09:50-16:18

2 stops38h 28m

£720

Flights are sorted by cheapest return flights first.

Deals found on 3/11

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 17h 10m. Delta provides one of the quickest options available for as low as £720. 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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