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?

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.

$709 Cheap Flights from Seattle to Cardiff in 2025/26

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Find the cheapest flights from Seattle to Cardiff

Round-trip

One-way

Cheap round-trip flights

7:25 am - 9:50 amSEA-CWL

19h 25m2 stops

10:20 am - 10:03 pmCWL-SEA

19h 43m2 stops

$911Delta

Find Deal

Fri, Oct 31 - Fri, Nov 7

1:30 pm - 4:45 pmSEA-CWL

19h 15m2 stops

5:35 pm - 4:05 pmCWL-SEA

30h 30m1 stop

$950KLM

Find Deal

Wed, Oct 1 - Sat, Oct 11

5:40 pm - 9:15 amSEA-CWL

31h 35m1 stop

9:45 am - 4:05 pmCWL-SEA

14h 20m1 stop

$989Multiple Airlines

Find Deal

Wed, Oct 1 - Sat, Oct 11

6:00 am - 9:50 amSEA-CWL

20h 50m2 stops

5:15 pm - 11:45 amCWL-SEA

26h 30m1 stop

$1,001Virgin Atlantic

Find Deal

Fri, Oct 31 - Fri, Nov 7

9:40 am - 4:45 pmSEA-CWL

23h 05m2 stops

9:45 am - 10:03 pmCWL-SEA

20h 18m2 stops

$1,011Delta

Find Deal

Wed, Oct 1 - Sat, Oct 11

8:40 am - 8:05 pmSEA-CWL

27h 25m2 stops

9:00 am - 10:31 pmCWL-SEA

21h 31m3 stops

$1,237Multiple Airlines

Find Deal

Wed, Oct 1 - Sat, Oct 11

10:00 am - 8:05 pmSEA-CWL

26h 05m3 stops

9:00 am - 10:31 pmCWL-SEA

21h 31m3 stops

$1,249Multiple Airlines

Find Deal

Wed, Oct 1 - Sat, Oct 11

4:00 pm - 4:55 pmSEA-CWL

17h 55m1 stop

5:15 pm - 11:45 amCWL-SEA

26h 30m1 stop

$1,253KLM

Find Deal

Fri, Oct 31 - Fri, Nov 7

3:35 pm - 7:40 pmSEA-CWL

21h 05m2 stops

7:45 pm - 5:00 pmCWL-SEA

29h 15m3 stops

$1,507Multiple Airlines

Find Deal

Fri, Oct 31 - Fri, Nov 7

9:05 pm - 11:30 amSEA-CWL

31h 25m3 stops

7:45 pm - 5:00 pmCWL-SEA

29h 15m3 stops

$2,003Multiple Airlines

Find Deal

Fri, Oct 31 - Fri, Nov 7

Delta flights from Seattle to Cardiff

Our best Delta deals on Seattle to Cardiff flight tickets

Delta

Oct 31

SEA7:25 amSeattle/Tacoma Intl

19h 25m

2 stops

CWL9:50 amCardiff Wales

Nov 7

CWL10:20 amCardiff Wales

19h 43m

2 stops

SEA10:03 pmSeattle/Tacoma Intl

$911

Find similar

Delta

Oct 1

SEA9:40 amSeattle/Tacoma Intl

23h 05m

2 stops

CWL4:45 pmCardiff Wales

Oct 11

CWL9:45 amCardiff Wales

20h 18m

2 stops

SEA10:03 pmSeattle/Tacoma Intl

$1,011

Find similar

KLM flights from Seattle to Cardiff

Our best KLM deals on Seattle to Cardiff flight tickets

KLM

Oct 1

SEA1:30 pmSeattle/Tacoma Intl

19h 15m

2 stops

CWL4:45 pmCardiff Wales

Oct 11

CWL5:35 pmCardiff Wales

30h 30m

1 stop

SEA4:05 pmSeattle/Tacoma Intl

$950

Find similar

KLM

Oct 31

SEA4:00 pmSeattle/Tacoma Intl

17h 55m

1 stop

CWL4:55 pmCardiff Wales

Nov 7

CWL5:15 pmCardiff Wales

26h 30m

1 stop

SEA11:45 amSeattle/Tacoma Intl

$1,253

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Fri 10/31

7:25 am-9:50 am

2 stops19h 25m

Cardiff Wales

Fri 11/7

10:20 am-10:03 pm

2 stops19h 43m

$911

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Wed 10/1

1:30 pm-4:45 pm

2 stops19h 15m

Cardiff Wales

Sat 10/11

5:35 pm-4:05 pm

1 stop30h 30m

$950

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Wed 10/1

5:40 pm-9:15 am

1 stop31h 35m

Cardiff Wales

Sat 10/11

9:45 am-4:05 pm

1 stop14h 20m

$989

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Fri 10/31

6:00 am-9:50 am

2 stops20h 50m

Cardiff Wales

Fri 11/7

5:15 pm-11:45 am

1 stop26h 30m

$1,001

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Wed 10/1

9:40 am-4:45 pm

2 stops23h 05m

Cardiff Wales

Sat 10/11

9:45 am-10:03 pm

2 stops20h 18m

$1,011

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Wed 10/1

8:40 am-8:05 pm

2 stops27h 25m

Cardiff Wales

Sat 10/11

9:00 am-10:31 pm

3 stops21h 31m

$1,237

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Wed 10/1

10:00 am-8:05 pm

3 stops26h 05m

Cardiff Wales

Sat 10/11

9:00 am-10:31 pm

3 stops21h 31m

$1,249

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Fri 10/31

4:00 pm-4:55 pm

1 stop17h 55m

Cardiff Wales

Fri 11/7

5:15 pm-11:45 am

1 stop26h 30m

$1,253

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Fri 10/31

3:35 pm-7:40 pm

2 stops21h 05m

Cardiff Wales

Fri 11/7

7:45 pm-5:00 pm

3 stops29h 15m

$1,507

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Fri 10/31

9:05 pm-11:30 am

3 stops31h 25m

Cardiff Wales

Fri 11/7

7:45 pm-5:00 pm

3 stops29h 15m

$2,003

Flights are sorted by cheapest round-trip 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 day to depart on your flight to Cardiff?

The cheapest day to depart on your flight to Cardiff is on a Wednesday when prices can be found for as low as $808. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $1,303. These prices are subject to change though, so be sure to set up a Price Alert for flights to Cardiff.

What is the cheapest time of day to depart on your flight to Cardiff?

Flying to Cardiff from Seattle in the morning is the least expensive time of day to depart. momondo users have found prices as low as $941 when looking at flights departing in the morning. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,132 on average. Flights to Cardiff from Seattle in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

Direct flights	None

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

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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 17h 55m.
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?
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.

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.