How do I get Price Alerts for flights from Seattle to Cardiff?

You can take advantage of momondo’s Price Alerts by first searching for your flights to Seattle from Cardiff . Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

How can I save money on flights from Seattle to Cardiff with momondo?

Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore” . Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

How does momondo find its flight prices?

momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Cardiff Wales Airport?

Prices for flights from Seattle/Tacoma Intl Airport to Cardiff Wales Airport refresh daily.

How old do you have to be to fly from Seattle/Tacoma Intl Airport to Cardiff Wales Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport 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.

£571 Cheap Flights from Seattle to Cardiff in 2026

1 adult

0 bags

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Find the cheapest flights from Seattle to Cardiff

Round-trip

One-way

Cheap return flights

Enter your travel dates to find the best prices.

06:00 - 09:50

SEA

CWL

19h 50m2 stops

17:25 - 11:35

CWL

SEA

26h 10m1 stop

£571Virgin Atlantic

Sa, 21 Feb - Sa, 28 Feb

06:10 - 09:50

SEA

CWL

19h 40m2 stops

10:20 - 22:22

CWL

SEA

20h 02m2 stops

£579Delta

Sa, 21 Feb - Sa, 28 Feb

15:05 - 09:50

SEA

CWL

34h 45m1 stop

10:20 - 11:35

CWL

SEA

33h 15m1 stop

£643KLM

Sa, 21 Feb - Sa, 28 Feb

21:55 - 09:50

SEA

CWL

27h 55m2 stops

10:20 - 12:35

CWL

SEA

33h 15m1 stop

£658Scandinavian Airlines

Do, 19 Feb - Di, 10 Mrz

21:55 - 09:50

SEA

CWL

27h 55m2 stops

17:25 - 14:57

CWL

SEA

28h 32m2 stops

£666Multiple Airlines

Do, 19 Feb - Di, 10 Mrz

15:05 - 09:50

SEA

CWL

34h 45m1 stop

17:25 - 12:35

CWL

SEA

26h 10m1 stop

£791KLM

Do, 19 Feb - Di, 10 Mrz

07:05 - 10:15

SEA

CWL

43h 10m2 stops

11:35 - 13:08

CWL

SEA

33h 33m2 stops

£920WestJet

Di, 23 Jun - Di, 30 Jun

17:35 - 16:45

SEA

CWL

15h 10m1 stop

17:15 - 16:20

CWL

SEA

31h 05m1 stop

£994KLM

Di, 23 Jun - Di, 30 Jun

17:35 - 09:15

SEA

CWL

31h 40m1 stop

09:45 - 22:05

CWL

SEA

20h 20m2 stops

£1,002Multiple Airlines

Di, 23 Jun - Di, 30 Jun

KLM flights from Seattle to Cardiff

Our best KLM deals on Seattle to Cardiff flight tickets

KLM

21 Feb

SEA15:05Seattle/Tacoma Intl

34h 45m

1 stop

CWL09:50Cardiff Wales

28 Feb

CWL10:20Cardiff Wales

33h 15m

1 stop

SEA11:35Seattle/Tacoma Intl

£643

KLM

19 Feb

SEA15:05Seattle/Tacoma Intl

34h 45m

1 stop

CWL09:50Cardiff Wales

10 Mar

CWL17:25Cardiff Wales

26h 10m

1 stop

SEA12:35Seattle/Tacoma Intl

£791

KLM

23 Jun

SEA17:35Seattle/Tacoma Intl

15h 10m

1 stop

CWL16:45Cardiff Wales

30 Jun

CWL17:15Cardiff Wales

31h 05m

1 stop

SEA16:20Seattle/Tacoma Intl

£994

Fly from

Fly to

Route

Depart

Return

Price

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sa 21/2

06:00-09:50

2 stops19h 50m

Cardiff Wales

Sa 28/2

17:25-11:35

1 stop26h 10m

£571

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sa 21/2

06:10-09:50

2 stops19h 40m

Cardiff Wales

Sa 28/2

10:20-22:22

2 stops20h 02m

£579

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sa 21/2

15:05-09:50

1 stop34h 45m

Cardiff Wales

Sa 28/2

10:20-11:35

1 stop33h 15m

£643

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Do 19/2

21:55-09:50

2 stops27h 55m

Cardiff Wales

Di 10/3

10:20-12:35

1 stop33h 15m

£658

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Do 19/2

21:55-09:50

2 stops27h 55m

Cardiff Wales

Di 10/3

17:25-14:57

2 stops28h 32m

£666

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Do 19/2

15:05-09:50

1 stop34h 45m

Cardiff Wales

Di 10/3

17:25-12:35

1 stop26h 10m

£791

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Di 23/6

07:05-10:15

2 stops43h 10m

Cardiff Wales

Di 30/6

11:35-13:08

2 stops33h 33m

£920

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Di 23/6

17:35-16:45

1 stop15h 10m

Cardiff Wales

Di 30/6

17:15-16:20

1 stop31h 05m

£994

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Di 23/6

17:35-09:15

1 stop31h 40m

Cardiff Wales

Di 30/6

09:45-22:05

2 stops20h 20m

£1,002

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

When to book flights from Seattle to Cardiff

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Cardiff according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap Seattle to Cardiff (SEA to CWL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Cardiff

Fastest flight time	19h 50m
Direct flights	None

The fastest flight from Seattle to Cardiff takes 19h 50m

There are no direct flights from Seattle to Cardiff. There are no popular flight routes from Seattle to Cardiff.

Search flight deals

How far is Seattle/Tacoma Intl to Cardiff Wales by plane?
Seattle/Tacoma Intl and Cardiff Wales are 4700.6 mi apart from one another. Typically, this will take 19h 50m by plane in normal conditions.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Cardiff Wales Airport?
Prices for flights from Seattle/Tacoma Intl Airport to Cardiff Wales Airport refresh daily.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Cardiff Wales Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport 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 Seattle to Cardiff?
You can take advantage of momondo’s Price Alerts by first searching for your flights to Seattle from Cardiff. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.
How can I save money on flights from Seattle to Cardiff with momondo?
Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.
How does momondo find its flight prices?
momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

Barry

Bridgend

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Cardiff from Seattle.

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

All flight searches from Seattle to Cardiff on momondo can be filtered to show those which offer flexible booking policies.

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

Once all potential Seattle to Cardiff flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of Seattle to Cardiff flights. All you need is a valid email address and we will do the rest; it is that quick and easy.