When did momondo last update prices for flights from Washington to Cardiff Wales Airport?

Prices for flights from Washington to Cardiff Wales Airport refresh daily.

How old do you have to be to fly from Washington 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 Washington 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.

$806 Cheap Flights from Washington to Cardiff in 2025/26

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0 bags

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Find the cheapest flights from Washington to Cardiff

Round-trip

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Cheap round-trip flights

Enter your travel dates to find the best prices.

3:00 pm - 4:55 pmSEA-CWL

17h 55m1 stop

5:25 pm - 11:45 amCWL-SEA

26h 20m1 stop

$806KLM

Find Deal

Wed, Nov 19 - Wed, Nov 26

7:20 am - 9:50 amSEA-CWL

18h 30m2 stops

5:25 pm - 11:45 amCWL-SEA

26h 20m1 stop

$810KLM

Find Deal

Wed, Nov 19 - Wed, Nov 26

7:20 am - 9:50 amSEA-CWL

18h 30m2 stops

10:20 am - 10:23 pmCWL-SEA

20h 03m2 stops

$820Delta

Find Deal

Wed, Nov 19 - Wed, Nov 26

8:05 pm - 8:05 amSEA-CWL

28h 00m3 stops

3:55 pm - 10:16 pmCWL-SEA

38h 21m3 stops

$1,399Multiple Airlines

Find Deal

Wed, Nov 19 - Wed, Nov 26

KLM flights from State of Washington to Cardiff

Our best KLM deals on State of Washington to Cardiff flight tickets

KLM

Nov 19

SEA3:00 pmSeattle/Tacoma Intl

17h 55m

1 stop

CWL4:55 pmCardiff Wales

Nov 26

CWL5:25 pmCardiff Wales

26h 20m

1 stop

SEA11:45 amSeattle/Tacoma Intl

$806

Find similar

KLM

Nov 19

SEA7:20 amSeattle/Tacoma Intl

18h 30m

2 stops

CWL9:50 amCardiff Wales

Nov 26

CWL5:25 pmCardiff Wales

26h 20m

1 stop

SEA11:45 amSeattle/Tacoma Intl

$810

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Wed 11/19

3:00 pm-4:55 pm

1 stop17h 55m

Cardiff Wales

Wed 11/26

5:25 pm-11:45 am

1 stop26h 20m

$806

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Wed 11/19

7:20 am-9:50 am

2 stops18h 30m

Cardiff Wales

Wed 11/26

5:25 pm-11:45 am

1 stop26h 20m

$810

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Wed 11/19

7:20 am-9:50 am

2 stops18h 30m

Cardiff Wales

Wed 11/26

10:20 am-10:23 pm

2 stops20h 03m

$820

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Wed 11/19

8:05 pm-8:05 am

3 stops28h 00m

Cardiff Wales

Wed 11/26

3:55 pm-10:16 pm

3 stops38h 21m

$1,399

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from State of Washington 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 State of Washington 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 State of Washington in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

Cheap State of Washington to Cardiff flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Cardiff

Direct flights	None

There are no direct flights from State of Washington to Cardiff. There are no popular flight routes from State of Washington to Cardiff.

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When did momondo last update prices for flights from Washington to Cardiff Wales Airport?
Prices for flights from Washington to Cardiff Wales Airport refresh daily.
How old do you have to be to fly from Washington 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 Washington 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 Washington to Cardiff?

Finding the right flight to Cardiff from Washington is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Cardiff quick and easy, saving you time and money.

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

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

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Cardiff from Washington.

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

If you are not ready to book a flight from Washington to Cardiff now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Cardiff and let you know when they change.