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 many operators does momondo search for flights from Washington to Cardiff Wales Airport?

As of August 2025, there is 1 operator available to choose from for flights from Washington to Cardiff Wales Airport.

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.

$1,008 Cheap Flights from Washington to Cardiff in 2025

1 adult

0 bags

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Find the cheapest flights from Washington to Cardiff

Round-trip

One-way

Cheap round-trip flights

5:40 pm - 4:45 pmSEA-CWL

15h 05m1 stop

9:50 am - 11:45 amCWL-SEA

33h 55m1 stop

$1,008KLM

Find Deal

Tue, Aug 19 - Tue, Sep 2

12:15 pm - 4:45 pmSEA-CWL

20h 30m2 stops

9:50 am - 4:05 pmCWL-SEA

14h 15m1 stop

$1,013Delta

Find Deal

Tue, Aug 19 - Tue, Sep 2

7:10 am - 9:15 amSEA-CWL

18h 05m2 stops

9:50 am - 10:25 pmCWL-SEA

20h 35m2 stops

$1,023Delta

Find Deal

Tue, Aug 19 - Tue, Sep 2

5:40 pm - 9:15 amSEA-CWL

31h 35m1 stop

5:15 pm - 11:45 amCWL-SEA

26h 30m1 stop

$1,045KLM

Find Deal

Sat, Sep 13 - Fri, Sep 19

7:45 am - 9:15 amSEA-CWL

17h 30m2 stops

5:15 pm - 11:45 amCWL-SEA

26h 30m1 stop

$1,127KLM

Find Deal

Sat, Sep 13 - Fri, Sep 19

10:15 am - 4:45 pmSEA-CWL

22h 30m2 stops

9:50 am - 10:01 pmCWL-SEA

20h 11m2 stops

$1,213Delta

Find Deal

Sat, Sep 13 - Fri, Sep 19

10:00 am - 7:50 pmSEA-CWL

25h 50m3 stops

4:20 pm - 6:36 pmCWL-SEA

34h 16m3 stops

$1,587

Find Deal

Tue, Aug 19 - Tue, Sep 2

10:00 am - 7:50 pmSEA-CWL

25h 50m3 stops

5:05 pm - 5:50 pmCWL-SEA

32h 45m2 stops

$1,781

Find Deal

Tue, Aug 19 - Tue, Sep 2

KLM flights from State of Washington to Cardiff

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

KLM

Aug 19

SEA5:40 pmSeattle/Tacoma Intl

15h 05m

1 stop

CWL4:45 pmCardiff Wales

Sep 2

CWL9:50 amCardiff Wales

33h 55m

1 stop

SEA11:45 amSeattle/Tacoma Intl

$1,008

Find similar

KLM

Sep 13

SEA5:40 pmSeattle/Tacoma Intl

31h 35m

1 stop

CWL9:15 amCardiff Wales

Sep 19

CWL5:15 pmCardiff Wales

26h 30m

1 stop

SEA11:45 amSeattle/Tacoma Intl

$1,045

Find similar

KLM

Sep 13

SEA7:45 amSeattle/Tacoma Intl

17h 30m

2 stops

CWL9:15 amCardiff Wales

Sep 19

CWL5:15 pmCardiff Wales

26h 30m

1 stop

SEA11:45 amSeattle/Tacoma Intl

$1,127

Find similar

Delta flights from State of Washington to Cardiff

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

Delta

Aug 19

SEA12:15 pmSeattle/Tacoma Intl

20h 30m

2 stops

CWL4:45 pmCardiff Wales

Sep 2

CWL9:50 amCardiff Wales

14h 15m

1 stop

SEA4:05 pmSeattle/Tacoma Intl

$1,013

Find similar

Delta

Aug 19

SEA7:10 amSeattle/Tacoma Intl

18h 05m

2 stops

CWL9:15 amCardiff Wales

Sep 2

CWL9:50 amCardiff Wales

20h 35m

2 stops

SEA10:25 pmSeattle/Tacoma Intl

$1,023

Find similar

Delta

Sep 13

SEA10:15 amSeattle/Tacoma Intl

22h 30m

2 stops

CWL4:45 pmCardiff Wales

Sep 19

CWL9:50 amCardiff Wales

20h 11m

2 stops

SEA10:01 pmSeattle/Tacoma Intl

$1,213

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Tue 8/19

5:40 pm-4:45 pm

1 stop15h 05m

Cardiff Wales

Tue 9/2

9:50 am-11:45 am

1 stop33h 55m

$1,008

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Tue 8/19

12:15 pm-4:45 pm

2 stops20h 30m

Cardiff Wales

Tue 9/2

9:50 am-4:05 pm

1 stop14h 15m

$1,013

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Tue 8/19

7:10 am-9:15 am

2 stops18h 05m

Cardiff Wales

Tue 9/2

9:50 am-10:25 pm

2 stops20h 35m

$1,023

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sat 9/13

5:40 pm-9:15 am

1 stop31h 35m

Cardiff Wales

Fri 9/19

5:15 pm-11:45 am

1 stop26h 30m

$1,045

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sat 9/13

7:45 am-9:15 am

2 stops17h 30m

Cardiff Wales

Fri 9/19

5:15 pm-11:45 am

1 stop26h 30m

$1,127

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sat 9/13

10:15 am-4:45 pm

2 stops22h 30m

Cardiff Wales

Fri 9/19

9:50 am-10:01 pm

2 stops20h 11m

$1,213

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Tue 8/19

10:00 am-7:50 pm

3 stops25h 50m

Cardiff Wales

Tue 9/2

4:20 pm-6:36 pm

3 stops34h 16m

$1,587

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Tue 8/19

10:00 am-7:50 pm

3 stops25h 50m

Cardiff Wales

Tue 9/2

5:05 pm-5:50 pm

2 stops32h 45m

$1,781

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

Best Price Found	$1,008
Fastest flight time	15h 05m
Direct flights	None
Airports in Cardiff	1 airport

The best flight deal from State of Washington to Cardiff found on momondo in the last 72 hours is $1,008

The fastest flight from State of Washington to Cardiff takes 15h 05m

There are no direct flights from State of Washington to Cardiff. Popular non-direct route for this connection is Seattle/Tacoma Intl Airport - Cardiff Wales Airport.

There is 1 airport near Cardiff: Cardiff Wales (CWL)

Search flight deals

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 many operators does momondo search for flights from Washington to Cardiff Wales Airport?
As of August 2025, there is 1 operator available to choose from for flights from Washington to Cardiff Wales Airport.
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.

Best airlines flying from State of Washington to Cardiff

Compare and see reviews for airlines that fly from State of Washington to Cardiff with momondo

Airline	Rating	Free Cancellation	Price
KLM	PriceFrom $760	Free Cancellation	Rating 7.8 1,381 reviews		Search KLM flights

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.