How does KAYAK find such low prices on flights from Washington to Cardiff?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington to Cardiff.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington to Cardiff?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Cardiff from Washington is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Washington to Cardiff?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Cardiff with an airline and back to Washington with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington to Cardiff?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Cardiff from Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

$948 CHEAP FLIGHTS from Washington to Cardiff

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Flight Deals

Cheap Flights from Washington to Cardiff

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

Recent round-trip flight deals from Washington to Cardiff

Tue, Oct 27 - Tue, Nov 3

3:25 pm - 5:00 pmSEA Seattle/Tacoma Intl-CWL Cardiff Wales

18h 35m1 stop Amsterdam Schiphol

10:20 am - 10:05 pmCWL Cardiff Wales-SEA Seattle/Tacoma Intl

19h 45m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

$948KLM

Tue, Oct 27 - Tue, Nov 3

7:22 am - 9:50 amSEA Seattle/Tacoma Intl-CWL Cardiff Wales

19h 28m2 stops Atlanta Hartsfield-Jackson Amsterdam Schiphol

10:20 am - 10:05 pmCWL Cardiff Wales-SEA Seattle/Tacoma Intl

19h 45m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

$948KLM

Tue, Oct 27 - Tue, Nov 3

3:25 pm - 5:00 pmSEA Seattle/Tacoma Intl-CWL Cardiff Wales

18h 35m1 stop Amsterdam Schiphol

10:20 am - 10:05 pmCWL Cardiff Wales-SEA Seattle/Tacoma Intl

19h 45m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

$950Delta

Tue, Oct 27 - Tue, Nov 3

7:22 am - 9:50 amSEA Seattle/Tacoma Intl-CWL Cardiff Wales

19h 28m2 stops Atlanta Hartsfield-Jackson Amsterdam Schiphol

10:20 am - 10:05 pmCWL Cardiff Wales-SEA Seattle/Tacoma Intl

19h 45m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

$955KLM

Tue, Oct 27 - Tue, Nov 3

3:25 pm - 5:00 pmSEA Seattle/Tacoma Intl-CWL Cardiff Wales

18h 35m1 stop Amsterdam Schiphol

5:30 pm - 11:47 amCWL Cardiff Wales-SEA Seattle/Tacoma Intl

26h 17m1 stop Amsterdam Schiphol

$971Multiple Airlines

Sat, Oct 24 - Sat, Oct 31

1:40 pm - 6:00 pmSEA Seattle/Tacoma Intl-CWL Cardiff Wales

20h 20m2 stops Atlanta Hartsfield-Jackson Amsterdam Schiphol

10:20 am - 11:36 amCWL Cardiff Wales-SEA Seattle/Tacoma Intl

32h 16m2 stops Amsterdam Schiphol New York John F Kennedy Intl

$1,055Delta

Sat, Oct 24 - Sat, Oct 31

7:10 pm - 8:10 amSEA Seattle/Tacoma Intl-CWL Cardiff Wales

30h 00m1 stop Dublin

11:50 pm - 9:22 amCWL Cardiff Wales-SEA Seattle/Tacoma Intl

40h 32m2 stops Dublin San Francisco

$1,060Multiple Airlines

Sat, Oct 24 - Sat, Oct 31

10:30 am - 2:55 pmSEA Seattle/Tacoma Intl-CWL Cardiff Wales

20h 25m2 stops Calgary Dublin

8:15 am - 9:57 pmCWL Cardiff Wales-SEA Seattle/Tacoma Intl

20h 42m3 stops Dublin Reykjavik Keflavik Intl Vancouver Intl

$1,068Multiple Airlines

Sat, Oct 24 - Sat, Oct 31

10:50 am - 2:55 pmSEA Seattle/Tacoma Intl-CWL Cardiff Wales

20h 05m3 stops Vancouver Intl Calgary Dublin

8:15 am - 9:57 pmCWL Cardiff Wales-SEA Seattle/Tacoma Intl

20h 42m3 stops Dublin Reykjavik Keflavik Intl Vancouver Intl

$1,104Multiple Airlines

Mon, Jan 25 - Sat, Jan 30

2:25 pm - 5:00 pmSEA Seattle/Tacoma Intl-CWL Cardiff Wales

18h 35m1 stop Amsterdam Schiphol

5:30 pm - 11:50 amCWL Cardiff Wales-SEA Seattle/Tacoma Intl

26h 20m1 stop Amsterdam Schiphol

$1,106KLM

Useful Info

Cheapest flight	$948

Flight from Seattle to Cardiff

How does KAYAK find such low prices on flights from Washington to Cardiff?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington to Cardiff.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington to Cardiff?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Cardiff from Washington is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Washington to Cardiff?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Cardiff with an airline and back to Washington with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington to Cardiff?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Cardiff from Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.