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Cheap flights from Washington to Cardiff from £768

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Cardiff departing on 20/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags
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Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
19:10 - 22:50
SEA
-
CWL
19h 40m
1 stop
Multiple Airlines Logo
22:10 - 19:23
CWL
-
SEA
29h 13m
2 stops
£768Multiple Airlines
Mon, 20 Apr - Mon, 27 Apr
Air France Logo
17:35 - 16:45
SEA
-
CWL
15h 10m
1 stop
Air France Logo
17:15 - 16:30
CWL
-
SEA
31h 15m
1 stop
£784Air France
Mon, 20 Apr - Mon, 27 Apr
Virgin Atlantic Logo
06:00 - 09:15
SEA
-
CWL
19h 15m
2 stops
Virgin Atlantic Logo
17:15 - 16:48
CWL
-
SEA
31h 33m
2 stops
£785Virgin Atlantic
Mon, 20 Apr - Mon, 27 Apr
KLM Logo
17:40 - 09:15
SEA
-
CWL
31h 35m
1 stop
KLM Logo
09:45 - 11:37
CWL
-
SEA
33h 52m
1 stop
£811KLM
Sun, 17 May - Mon, 1 Jun
Multiple Airlines Logo
15:40 - 09:15
SEA
-
CWL
33h 35m
3 stops
Multiple Airlines Logo
17:15 - 18:45
CWL
-
SEA
33h 30m
3 stops
£816Multiple Airlines
Mon, 20 Apr - Mon, 27 Apr
Delta Logo
12:00 - 16:45
SEA
-
CWL
20h 45m
2 stops
Delta Logo
09:45 - 22:05
CWL
-
SEA
20h 20m
2 stops
£827Delta
Thu, 17 Sep - Thu, 24 Sep
Multiple Airlines Logo
19:00 - 09:10
SEA
-
CWL
30h 10m
2 stops
Multiple Airlines Logo
22:45 - 17:10
CWL
-
SEA
26h 25m
1 stop
£828Multiple Airlines
Fri, 8 May - Fri, 15 May
Air France Logo
13:50 - 16:45
SEA
-
CWL
18h 55m
1 stop
Air France Logo
09:45 - 22:05
CWL
-
SEA
20h 20m
2 stops
£846Air France
Thu, 17 Sep - Thu, 24 Sep
Delta Logo
13:45 - 17:05
SEA
-
CWL
19h 20m
1 stop
Delta Logo
09:45 - 16:30
CWL
-
SEA
14h 45m
1 stop
£861Delta
Fri, 8 May - Fri, 15 May
Multiple Airlines Logo
19:10 - 21:45
SEA
-
CWL
18h 35m
1 stop
Multiple Airlines Logo
22:10 - 19:19
CWL
-
SEA
29h 09m
2 stops
£862Multiple Airlines
Sun, 17 May - Mon, 1 Jun

Air France flights from State of Washington to Cardiff

Our best Air France deals on State of Washington to Cardiff flight tickets
Air France
20 Apr
SEA17:35Seattle/Tacoma Intl
15h 10m
1 stop
CWL16:45Cardiff Wales
27 Apr
CWL17:15Cardiff Wales
31h 15m
1 stop
SEA16:30Seattle/Tacoma Intl
£784
Air France
17 Sept
SEA13:50Seattle/Tacoma Intl
18h 55m
1 stop
CWL16:45Cardiff Wales
24 Sept
CWL09:45Cardiff Wales
20h 20m
2 stops
SEA22:05Seattle/Tacoma Intl
£846

Delta flights from State of Washington to Cardiff

Our best Delta deals on State of Washington to Cardiff flight tickets
Delta
17 Sept
SEA12:00Seattle/Tacoma Intl
20h 45m
2 stops
CWL16:45Cardiff Wales
24 Sept
CWL09:45Cardiff Wales
20h 20m
2 stops
SEA22:05Seattle/Tacoma Intl
£827
Delta
8 May
SEA13:45Seattle/Tacoma Intl
19h 20m
1 stop
CWL17:05Cardiff Wales
15 May
CWL09:45Cardiff Wales
14h 45m
1 stop
SEA16:30Seattle/Tacoma Intl
£861
Delta
8 May
SEA06:00Seattle/Tacoma Intl
19h 15m
2 stops
CWL09:15Cardiff Wales
15 May
CWL09:45Cardiff Wales
20h 55m
2 stops
SEA22:40Seattle/Tacoma Intl
£872

momondo Fare Finder

 
Customise your flight search to find flights from State of 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, momondo users made 279,928 searches. Data last updated 25 March 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 - CWL

SEACWL

Seattle/Tacoma Intl

Mon 20/4

19:10-22:50

1 stop19h 40m

Cardiff Wales

Mon 27/4

22:10-19:23

2 stops29h 13m

£768

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Mon 20/4

17:35-16:45

1 stop15h 10m

Cardiff Wales

Mon 27/4

17:15-16:30

1 stop31h 15m

£784

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Mon 20/4

06:00-09:15

2 stops19h 15m

Cardiff Wales

Mon 27/4

17:15-16:48

2 stops31h 33m

£785

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sun 17/5

17:40-09:15

1 stop31h 35m

Cardiff Wales

Mon 1/6

09:45-11:37

1 stop33h 52m

£811

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Mon 20/4

15:40-09:15

3 stops33h 35m

Cardiff Wales

Mon 27/4

17:15-18:45

3 stops33h 30m

£816

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Thu 17/9

12:00-16:45

2 stops20h 45m

Cardiff Wales

Thu 24/9

09:45-22:05

2 stops20h 20m

£827

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Fri 8/5

19:00-09:10

2 stops30h 10m

Cardiff Wales

Fri 15/5

22:45-17:10

1 stop26h 25m

£828

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Thu 17/9

13:50-16:45

1 stop18h 55m

Cardiff Wales

Thu 24/9

09:45-22:05

2 stops20h 20m

£846
Fastest return journey

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Fri 8/5

13:45-17:05

1 stop19h 20m

Cardiff Wales

Fri 15/5

09:45-16:30

1 stop14h 45m

£861

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sun 17/5

19:10-21:45

1 stop18h 35m

Cardiff Wales

Mon 1/6

22:10-19:19

2 stops29h 09m

£862

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

Cheap State of Washington to Cardiff flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Cardiff

Fastest flight time

20h 45m

Direct flights

None
The fastest flight from State of Washington to Cardiff takes 20h 45m
There are no direct flights from State of Washington to Cardiff. There are no popular flight routes from State of Washington to Cardiff.
Search flight deals

  • When did momondo last update prices for flights from Washington to Cardiff Wales Airport?

    Prices for flights from Washington to Cardiff Wales Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Washington to Cardiff Wales Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington to Cardiff Wales Airport.

  • What documentation or ID do you need to fly to Cardiff Wales Airport?

    The necessary travel and health documents for your Cardiff Wales Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • How do I get Price Alerts for flights from State of Washington to Cardiff?

    Search flight deals from State of Washington to Cardiff. While viewing offers you’ll have the option to create a Price Alert.

  • How can I save money on flights from State of Washington to Cardiff with momondo?

    With “Price Forecast”, learn how soon you should book your flight in advance. Down to the day of week and time of day, our information can inform you on the ideal time to book to save on your travel. Our “Price Calendar” shows you at a quick glance when to book your travel for lower rates. By setting “Price Alerts” you can monitor changes in price and target the ideal time to book. Search for your trip destination by budget amount via our “Explore” feature. Whether you’re looking for ideas for your next travel adventure or cost-cutting tips, our “Discover” content is a great place to start.

  • How does momondo find its flight prices?

    We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

Travelling to a place near Cardiff?

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

Why use momondo?

Why should I use momondo to find a flight deal from Washington to Cardiff?

It is quick and easy to find Washington to Cardiff flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Cardiff that suits you.

Can I find flights from Washington to Cardiff with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Cardiff from Washington with this policy.

How can momondo help me find flights from Washington to Cardiff?

momondo helps you find the best flight between Washington and Cardiff by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Washington to Cardiff right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Cardiff, momondo offers a useful price alert feature which will track prices for flights to Cardiff from Washington and alert you when they change.

An easier way to manage your Cardiff trip

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Find better results for your trip to the United Kingdom

Airports servicing Wales

Holyhead Anglesey Airport