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.

£314 Cheap Flights from Seattle to Cardiff in 2025/26

1 adult

0 bags

Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Seattle to Cardiff

Round-trip

One-way

Cheap return flights

Enter your travel dates to find the best prices.

15:05 - 09:50

SEA

CWL

34h 45m1 stop

17:25 - 11:40

CWL

SEA

26h 15m1 stop

£604KLM

Tue, 10 Feb - Tue, 17 Feb

07:40 - 09:50

SEA

CWL

18h 10m2 stops

17:25 - 11:40

CWL

SEA

26h 15m1 stop

£607KLM

Tue, 10 Feb - Tue, 17 Feb

14:00 - 17:30

SEA

CWL

19h 30m2 stops

10:20 - 11:40

CWL

SEA

33h 20m1 stop

£696Air France

Thu, 12 Feb - Thu, 19 Feb

13:40 - 17:30

SEA

CWL

19h 50m1 stop

10:20 - 11:40

CWL

SEA

33h 20m1 stop

£706Air France

Thu, 12 Feb - Thu, 19 Feb

17:55 - 14:30

SEA

CWL

36h 35m2 stops

10:20 - 22:22

CWL

SEA

20h 02m2 stops

£731Multiple Airlines

Thu, 12 Feb - Thu, 19 Feb

18:45 - 22:50

SEA

CWL

20h 05m1 stop

09:25 - 10:20

CWL

SEA

32h 55m2 stops

£745Multiple Airlines

Mon, 11 May - Sat, 23 May

06:05 - 09:50

SEA

CWL

19h 45m2 stops

10:20 - 22:22

CWL

SEA

20h 02m2 stops

£770Delta

Tue, 10 Feb - Tue, 17 Feb

18:45 - 22:50

SEA

CWL

20h 05m1 stop

23:50 - 16:59

CWL

SEA

25h 09m1 stop

£788Multiple Airlines

Mon, 1 Jun - Wed, 10 Jun

18:45 - 22:50

SEA

CWL

20h 05m1 stop

09:25 - 16:59

CWL

SEA

15h 34m1 stop

£799Multiple Airlines

Mon, 11 May - Sat, 23 May

09:20 - 10:15

SEA

CWL

16h 55m2 stops

23:50 - 16:59

CWL

SEA

25h 09m1 stop

£845Multiple Airlines

Mon, 1 Jun - Wed, 10 Jun

Delta flights from Seattle to Cardiff

Our best Delta deals on Seattle to Cardiff flight tickets

Delta

28 Jan

SEA09:25Seattle/Tacoma Intl

23h 30m

2 stops

CWL16:55Cardiff Wales

4 Feb

CWL10:20Cardiff Wales

20h 05m

2 stops

SEA22:25Seattle/Tacoma Intl

£575

Find similar

Delta

13 Feb

SEA07:10Seattle/Tacoma Intl

18h 40m

2 stops

CWL09:50Cardiff Wales

20 Feb

CWL10:20Cardiff Wales

20h 02m

2 stops

SEA22:22Seattle/Tacoma Intl

£798

Find similar

Delta

11 May

SEA09:50Seattle/Tacoma Intl

22h 55m

2 stops

CWL16:45Cardiff Wales

23 May

CWL09:45Cardiff Wales

20h 20m

2 stops

SEA22:05Seattle/Tacoma Intl

£851

Find similar

WestJet flights from Seattle to Cardiff

Our best WestJet deals on Seattle to Cardiff flight tickets

WestJet

1 Jun

SEA07:05Seattle/Tacoma Intl

19h 10m

2 stops

CWL10:15Cardiff Wales

15 Jun

CWL11:35Cardiff Wales

40h 53m

2 stops

SEA20:28Seattle/Tacoma Intl

£806

Find similar

WestJet

23 Jun

SEA07:05Seattle/Tacoma Intl

43h 10m

2 stops

CWL10:15Cardiff Wales

30 Jun

CWL11:35Cardiff Wales

40h 53m

2 stops

SEA20:28Seattle/Tacoma Intl

£939

Find similar

WestJet

23 Jun

SEA07:05Seattle/Tacoma Intl

43h 10m

2 stops

CWL10:15Cardiff Wales

30 Jun

CWL11:35Cardiff Wales

39h 03m

2 stops

SEA18:38Seattle/Tacoma Intl

£951

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Tue 10/2

15:05-09:50

1 stop34h 45m

Cardiff Wales

Tue 17/2

17:25-11:40

1 stop26h 15m

£604

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Tue 10/2

07:40-09:50

2 stops18h 10m

Cardiff Wales

Tue 17/2

17:25-11:40

1 stop26h 15m

£607

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Thu 12/2

14:00-17:30

2 stops19h 30m

Cardiff Wales

Thu 19/2

10:20-11:40

1 stop33h 20m

£696

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Thu 12/2

13:40-17:30

1 stop19h 50m

Cardiff Wales

Thu 19/2

10:20-11:40

1 stop33h 20m

£706

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Thu 12/2

17:55-14:30

2 stops36h 35m

Cardiff Wales

Thu 19/2

10:20-22:22

2 stops20h 02m

£731

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Mon 11/5

18:45-22:50

1 stop20h 05m

Cardiff Wales

Sat 23/5

09:25-10:20

2 stops32h 55m

£745

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Tue 10/2

06:05-09:50

2 stops19h 45m

Cardiff Wales

Tue 17/2

10:20-22:22

2 stops20h 02m

£770

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Mon 1/6

18:45-22:50

1 stop20h 05m

Cardiff Wales

Wed 10/6

23:50-16:59

1 stop25h 09m

£788

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Mon 11/5

18:45-22:50

1 stop20h 05m

Cardiff Wales

Sat 23/5

09:25-16:59

1 stop15h 34m

£799

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Mon 1/6

09:20-10:15

2 stops16h 55m

Cardiff Wales

Wed 10/6

23:50-16:59

1 stop25h 09m

£845

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted 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	20h 05m
Direct flights	None

The fastest flight from Seattle to Cardiff takes 20h 05m

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 20h 05m 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.