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Cheap flights from Seattle to Cardiff from $303

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Cardiff

Cheap round-trip flights

Enter your travel dates to find the best prices.
KLM Logo
2:35 pm - 5:00 pmSEA  Seattle/Tacoma Intl-CWL Cardiff Wales
18h 25m1 stop Amsterdam Schiphol
KLM Logo
5:30 pm - 11:50 amCWL  Cardiff Wales-SEA Seattle/Tacoma Intl
26h 20m1 stop Amsterdam Schiphol
$1,210KLM
Sun, Nov 1 - Tue, Dec 1
Air Europa Logo
6:55 pm - 9:45 amSEA  Seattle/Tacoma Intl-CWL Cardiff Wales
30h 50m2 stops Portland Amsterdam Schiphol
Air Europa Logo
5:30 pm - 11:50 amCWL  Cardiff Wales-SEA Seattle/Tacoma Intl
26h 20m1 stop Amsterdam Schiphol
$1,272Air Europa
Sun, Nov 1 - Tue, Dec 1
Multiple Airlines Logo
6:55 pm - 9:45 amSEA  Seattle/Tacoma Intl-CWL Cardiff Wales
30h 50m2 stops Portland Amsterdam Schiphol
Multiple Airlines Logo
5:30 pm - 12:35 pmCWL  Cardiff Wales-SEA Seattle/Tacoma Intl
51h 05m2 stops Amsterdam Schiphol Vancouver Intl
$1,272Multiple Airlines
Sun, Nov 1 - Tue, Dec 1
Multiple Airlines Logo
6:45 pm - 8:30 amSEA  Seattle/Tacoma Intl-CWL Cardiff Wales
29h 45m2 stops London Heathrow Belfast City
Multiple Airlines Logo
9:00 am - 11:25 amCWL  Cardiff Wales-SEA Seattle/Tacoma Intl
58h 25m2 stops Belfast City London Heathrow
$1,506Multiple Airlines
Tue, Dec 29 - Sun, Jan 3
Multiple Airlines Logo
2:35 pm - 9:15 pmSEA  Seattle/Tacoma Intl-CWL Cardiff Wales
22h 40m3 stops Reykjavik Keflavik Intl Glasgow Intl Dublin
Multiple Airlines Logo
9:00 am - 11:25 amCWL  Cardiff Wales-SEA Seattle/Tacoma Intl
58h 25m2 stops Belfast City London Heathrow
$1,770Multiple Airlines
Tue, Dec 29 - Sun, Jan 3
Delta Logo
2:35 pm - 5:00 pmSEA  Seattle/Tacoma Intl-CWL Cardiff Wales
18h 25m1 stop Amsterdam Schiphol
Delta Logo
10:20 am - 11:53 pmCWL  Cardiff Wales-SEA Seattle/Tacoma Intl
21h 33m2 stops Amsterdam Schiphol Minneapolis St Paul
$2,890Delta
Tue, Dec 29 - Sun, Jan 3
KLM Logo
2:35 pm - 5:00 pmSEA  Seattle/Tacoma Intl-CWL Cardiff Wales
18h 25m1 stop Amsterdam Schiphol
KLM Logo
5:30 pm - 11:50 amCWL  Cardiff Wales-SEA Seattle/Tacoma Intl
26h 20m1 stop Amsterdam Schiphol
$2,984KLM
Tue, Dec 29 - Sun, Jan 3
Multiple Airlines Logo
6:45 pm - 8:30 amSEA  Seattle/Tacoma Intl-CWL Cardiff Wales
29h 45m3 stops London Heathrow Glasgow Intl Belfast City
Multiple Airlines Logo
9:00 am - 11:47 pmCWL  Cardiff Wales-SEA Seattle/Tacoma Intl
22h 47m3 stops Belfast City London Heathrow Chicago O'Hare Intl
$7,029Multiple Airlines
Tue, Dec 29 - Sun, Jan 3

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KLM flights from Seattle to Cardiff

Our best KLM deals on Seattle to Cardiff flight tickets
KLM
Nov 1
SEA2:35 pmSeattle/Tacoma Intl
18h 25m
1 stop
CWL5:00 pmCardiff Wales
Dec 1
CWL5:30 pmCardiff Wales
26h 20m
1 stop
SEA11:50 amSeattle/Tacoma Intl
$1,210
KLM
Dec 29
SEA2:35 pmSeattle/Tacoma Intl
18h 25m
1 stop
CWL5:00 pmCardiff Wales
Jan 3
CWL5:30 pmCardiff Wales
26h 20m
1 stop
SEA11:50 amSeattle/Tacoma Intl
$2,984

momondo Fare Finder

 
Use the filters below to find and compare flights from Seattle to Cardiff that are best for you.

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Route

Depart

Return

Price

Cheapest round-trip

SeattleCardiff

SEA Seattle/Tacoma Intl - CWL Cardiff Wales

SEACWL

Seattle/Tacoma Intl

Sun 11/1

2:35 pm-5:00 pm

1 stop18h 25m

Cardiff Wales

Tue 12/1

5:30 pm-11:50 am

1 stop26h 20m

$1,210

SeattleCardiff

SEA Seattle/Tacoma Intl - CWL Cardiff Wales

SEACWL

Seattle/Tacoma Intl

Sun 11/1

6:55 pm-9:45 am

2 stops30h 50m

Cardiff Wales

Tue 12/1

5:30 pm-11:50 am

1 stop26h 20m

$1,272

SeattleCardiff

SEA Seattle/Tacoma Intl - CWL Cardiff Wales

SEACWL

Seattle/Tacoma Intl

Sun 11/1

6:55 pm-9:45 am

2 stops30h 50m

Cardiff Wales

Tue 12/1

5:30 pm-12:35 pm

2 stops51h 05m

$1,272

SeattleCardiff

SEA Seattle/Tacoma Intl - CWL Cardiff Wales

SEACWL

Seattle/Tacoma Intl

Tue 12/29

6:45 pm-8:30 am

2 stops29h 45m

Cardiff Wales

Sun 1/3

9:00 am-11:25 am

2 stops58h 25m

$1,506

SeattleCardiff

SEA Seattle/Tacoma Intl - CWL Cardiff Wales

SEACWL

Seattle/Tacoma Intl

Tue 12/29

2:35 pm-9:15 pm

3 stops22h 40m

Cardiff Wales

Sun 1/3

9:00 am-11:25 am

2 stops58h 25m

$1,770
Quickest round-trip

SeattleCardiff

SEA Seattle/Tacoma Intl - CWL Cardiff Wales

SEACWL

Seattle/Tacoma Intl

Tue 12/29

2:35 pm-5:00 pm

1 stop18h 25m

Cardiff Wales

Sun 1/3

10:20 am-11:53 pm

2 stops21h 33m

$2,890

SeattleCardiff

SEA Seattle/Tacoma Intl - CWL Cardiff Wales

SEACWL

Seattle/Tacoma Intl

Tue 12/29

2:35 pm-5:00 pm

1 stop18h 25m

Cardiff Wales

Sun 1/3

5:30 pm-11:50 am

1 stop26h 20m

$2,984

SeattleCardiff

SEA Seattle/Tacoma Intl - CWL Cardiff Wales

SEACWL

Seattle/Tacoma Intl

Tue 12/29

6:45 pm-8:30 am

3 stops29h 45m

Cardiff Wales

Sun 1/3

9:00 am-11:47 pm

3 stops22h 47m

$7,029
Cheapest one-way

SeattleCardiff

SEA Seattle/Tacoma Intl - CWL Cardiff Wales

SEACWL

Seattle/Tacoma Intl

Wed 10/21

7:35 pm-6:55 am

2 stops51h 20m

$303

SeattleCardiff

SEA Seattle/Tacoma Intl - CWL Cardiff Wales

SEACWL

Seattle/Tacoma Intl

Wed 10/21

3:40 pm-7:20 am

3 stops31h 40m

$331

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 resultsSorted by cheapest first
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See travel insights to Cardiff from

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?

KLM 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 round-trip 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

Best Price Found

$303

Fastest flight time

18h 25m

Direct flights

None
The best one-way flight to Cardiff from Seattle in the past 72 hours is $303. The best round-trip flight deal from Seattle to Cardiff found on momondo in the last 72 hours is $1,210.
The fastest flight from Seattle to Cardiff takes 18h 25m
There are no direct flights from Seattle to Cardiff. There are no popular flight routes from Seattle to Cardiff.
Search flight deals

Frequently asked questions about flying from Seattle to Cardiff

  • How far is Seattle/Tacoma Intl to Cardiff Wales by plane?

    The straight-line distance from Seattle/Tacoma Intl to Cardiff Wales is 4700.6 mi. In terms of flight time, this usually takes a little over 18h 25m.

  • 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 many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Cardiff Wales Airport?

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, 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.

  • What is the most popular airline from Seattle to Cardiff?

Best airlines flying from Seattle to Cardiff

Compare and see reviews for airlines that fly from Seattle to Cardiff with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $1,519Free CancellationRating
7.8
8,591 reviews
Search Delta flights

Traveling to a place near Cardiff?

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

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to Cardiff. Millions of users trust and use momondo every year so you are in good hands.

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

momondo does allow users to show only those flights to Cardiff from Seattle which offer a flexible booking policy as well as other useful filters and features.

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?

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 Seattle and alert you when they change.

An easier way to manage your Cardiff trip

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Delta
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