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.

£322 Cheap Flights from Seattle to Cardiff in 2025/26

1 adult

0 bags

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Find the cheapest flights from Seattle to Cardiff

Round-trip

One-way

Cheap return flights

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15:05 - 09:50

SEA

CWL

34h 45m1 stop

10:20 - 11:40

CWL

SEA

33h 20m1 stop

£568KLM

Mon, 2 Feb - Mon, 9 Feb

07:10 - 09:50

SEA

CWL

18h 40m2 stops

17:15 - 11:40

CWL

SEA

26h 25m1 stop

£571KLM

Mon, 2 Feb - Mon, 9 Feb

06:15 - 09:50

SEA

CWL

19h 35m2 stops

10:20 - 21:49

CWL

SEA

19h 29m2 stops

£579Delta

Mon, 2 Feb - Mon, 9 Feb

17:35 - 15:45

SEA

CWL

15h 10m1 stop

09:45 - 11:45

CWL

SEA

34h 00m1 stop

£874KLM

Sat, 28 Mar - Thu, 2 Apr

07:20 - 08:15

SEA

CWL

17h 55m2 stops

09:45 - 16:30

CWL

SEA

14h 45m1 stop

£877Delta

Sat, 28 Mar - Thu, 2 Apr

07:20 - 08:15

SEA

CWL

17h 55m2 stops

09:45 - 16:30

CWL

SEA

14h 45m1 stop

£878Virgin Atlantic

Sat, 28 Mar - Thu, 2 Apr

07:20 - 15:45

SEA

CWL

25h 25m2 stops

09:45 - 21:50

CWL

SEA

20h 05m2 stops

£885Virgin Atlantic

Sat, 28 Mar - Thu, 2 Apr

KLM flights from Seattle to Cardiff

Our best KLM deals on Seattle to Cardiff flight tickets

KLM

2 Feb

SEA15:05Seattle/Tacoma Intl

34h 45m

1 stop

CWL09:50Cardiff Wales

9 Feb

CWL10:20Cardiff Wales

33h 20m

1 stop

SEA11:40Seattle/Tacoma Intl

£568

Find similar

KLM

2 Feb

SEA07:10Seattle/Tacoma Intl

18h 40m

2 stops

CWL09:50Cardiff Wales

9 Feb

CWL17:15Cardiff Wales

26h 25m

1 stop

SEA11:40Seattle/Tacoma Intl

£571

Find similar

KLM

28 Mar

SEA17:35Seattle/Tacoma Intl

15h 10m

1 stop

CWL15:45Cardiff Wales

2 Apr

CWL09:45Cardiff Wales

34h 00m

1 stop

SEA11:45Seattle/Tacoma Intl

£874

Find similar

Delta flights from Seattle to Cardiff

Our best Delta deals on Seattle to Cardiff flight tickets

Delta

2 Feb

SEA06:15Seattle/Tacoma Intl

19h 35m

2 stops

CWL09:50Cardiff Wales

9 Feb

CWL10:20Cardiff Wales

19h 29m

2 stops

SEA21:49Seattle/Tacoma Intl

£579

Find similar

Delta

28 Mar

SEA07:20Seattle/Tacoma Intl

17h 55m

2 stops

CWL08:15Cardiff Wales

2 Apr

CWL09:45Cardiff Wales

14h 45m

1 stop

SEA16:30Seattle/Tacoma Intl

£877

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Mon 2/2

15:05-09:50

1 stop34h 45m

Cardiff Wales

Mon 9/2

10:20-11:40

1 stop33h 20m

£568

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Mon 2/2

07:10-09:50

2 stops18h 40m

Cardiff Wales

Mon 9/2

17:15-11:40

1 stop26h 25m

£571

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Mon 2/2

06:15-09:50

2 stops19h 35m

Cardiff Wales

Mon 9/2

10:20-21:49

2 stops19h 29m

£579

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sat 28/3

17:35-15:45

1 stop15h 10m

Cardiff Wales

Thu 2/4

09:45-11:45

1 stop34h 00m

£874

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sat 28/3

07:20-08:15

2 stops17h 55m

Cardiff Wales

Thu 2/4

09:45-16:30

1 stop14h 45m

£877

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sat 28/3

07:20-08:15

2 stops17h 55m

Cardiff Wales

Thu 2/4

09:45-16:30

1 stop14h 45m

£878

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sat 28/3

07:20-15:45

2 stops25h 25m

Cardiff Wales

Thu 2/4

09:45-21:50

2 stops20h 05m

£885

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Tue 9/6

07:05-10:15

2 stops43h 10m

£322

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Seattle to Cardiff

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Seattle/Tacoma Intl to Cardiff Wales?

WestJet is the most popular carrier operating from Seattle/Tacoma Intl to Cardiff Wales

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	15h 10m
Direct flights	None

The fastest flight from Seattle to Cardiff takes 15h 10m

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 15h 10m 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.

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.