Which airports can I use when flying from Seattle to Cardiff?

Flights from Seattle to Cardiff usually depart from Seattle/Tacoma Intl (SEA) and arrive at Cardiff Wales (CWL).

What cabin classes can I book on flights from Seattle to Cardiff?

Only Economy Class is available on flights from Seattle to Cardiff.

Which airports do connecting flights from Seattle to Cardiff pass through?

Most connecting flights from Seattle to Cardiff pass through Amsterdam Schiphol (AMS), which handles 100% of one-stop traffic on this route.

Can I save money by using flexible dates for flights from Seattle to Cardiff?

Yes. Flexible dates can save you up to 24% on flights from Seattle to Cardiff. Monday is the cheapest departure day at $1,172 round-trip on average, while Saturday is the most expensive at $1,532, a difference of $360. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

Do I need a passport to fly from Seattle to Cardiff?

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

Have flight prices from Seattle to Cardiff changed much recently?

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $1,093 to $9,812. That means the highest observed fare was about 9x higher than the lowest one.

What is the time difference between Seattle and Cardiff?

Cardiff is 8 hours ahead of Seattle (British Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

What car rental options are available at Cardiff Wales Airport (CWL)?

Cardiff Wales Airport (CWL) hosts 5 major car rental companies, with daily rates starting from around $15 for economy cars. Top options include: • Alamo • Budget • Avis • Enterprise Rent-A-Car • National

How much should I expect to pay for a Seattle to Cardiff flight?

Round-trip flights from Seattle to Cardiff range from $1,521 to $1,698, with an average of $1,532 over the past 12 months. Anything below $1,521 counts as a good deal.

How much is a round-trip flight from Seattle to Cardiff?

Round-trip flights from Seattle to Cardiff typically range from $1,521 to $1,698. The lowest price found in the past 5 days was $1,198, on KLM.

Which airline is the cheapest to fly from Seattle to Cardiff?

KLM ($1,198) and Air Europa ($1,783) are the cheapest airlines to fly round-trip from Seattle to Cardiff according to KAYAK data over the last 5 days.

What is the cheapest layover airport when flying from Seattle to Cardiff?

Flights via Amsterdam Schiphol (AMS) offer the most affordable fares, with an average round-trip price of $1,512. Based on KAYAK data over the past 3 months.

When flying from Seattle to Cardiff which airport offers the shortest layover?

Amsterdam Schiphol (AMS) had the shortest average connection time for Seattle to Cardiff layovers at 9h 18m over the past 3 months.

$1,198 CHEAP FLIGHTS from Seattle to Cardiff (SEA - CWL)

Save 25% 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.

Cheapest round-trip

$1,198

Typical prices: $1,521-$1,698

KLM

Wed 11/28Wed 12/5

SEA - CWL • 2 stops

Start a new search

KAYAK searches 100s of sites at once to find you the best travel deals.

We hope you love your trip to Cardiff!

Flight Deals

Cheap Flights from Seattle to Cardiff (SEA-CWL)

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

Round-trip

One-way

Recent round-trip flight deals from Seattle to Cardiff

Sat, Nov 28 - Sat, Dec 5

7:27 am - 9:50 amSEA Seattle/Tacoma Intl-CWL Cardiff Wales

18h 23m2 stops Chicago O'Hare Intl Amsterdam Schiphol

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

26h 20m1 stop Amsterdam Schiphol

$1,198KLM

Sat, Nov 28 - Sat, Dec 5

7:27 am - 9:50 amSEA Seattle/Tacoma Intl-CWL Cardiff Wales

18h 23m2 stops Chicago O'Hare Intl Amsterdam Schiphol

5:30 pm - 4:44 pmCWL Cardiff Wales-SEA Seattle/Tacoma Intl

31h 14m2 stops Amsterdam Schiphol San Francisco

$1,208KLM

Sat, Nov 28 - Sat, Dec 5

2:35 pm - 1:55 pmSEA Seattle/Tacoma Intl-CWL Cardiff Wales

15h 20m2 stops Reykjavik Keflavik Intl Dublin

10:50 am - 8:48 pmCWL Cardiff Wales-SEA Seattle/Tacoma Intl

41h 58m3 stops Granadilla Tenerife-Sur Casablanca Mohamed V Los Angeles

$1,222Multiple Airlines

Mon, Nov 30 - Wed, Dec 2

2:35 pm - 5:00 pmSEA Seattle/Tacoma Intl-CWL Cardiff Wales

18h 25m1 stop Amsterdam Schiphol

10:20 am - 10:04 pmCWL Cardiff Wales-SEA Seattle/Tacoma Intl

19h 44m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

$1,458KLM

Mon, Nov 30 - Wed, Dec 2

2:35 pm - 5:00 pmSEA Seattle/Tacoma Intl-CWL Cardiff Wales

18h 25m1 stop Amsterdam Schiphol

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

26h 20m1 stop Amsterdam Schiphol

$1,470KLM

Mon, Nov 30 - Wed, Dec 2

7:27 am - 9:45 amSEA Seattle/Tacoma Intl-CWL Cardiff Wales

18h 18m2 stops Chicago O'Hare Intl Amsterdam Schiphol

5:30 pm - 2:43 pmCWL Cardiff Wales-SEA Seattle/Tacoma Intl

29h 13m2 stops Amsterdam Schiphol Salt Lake City

$1,485KLM

Sat, Nov 28 - Sat, Dec 5

3:15 pm - 8:30 amSEA Seattle/Tacoma Intl-CWL Cardiff Wales

33h 15m3 stops Vancouver Intl London Heathrow Belfast City

10:50 am - 8:48 pmCWL Cardiff Wales-SEA Seattle/Tacoma Intl

41h 58m3 stops Granadilla Tenerife-Sur Casablanca Mohamed V Los Angeles

$1,689Multiple Airlines

Wed, Dec 23 - Wed, Dec 30

2:35 pm - 5:00 pmSEA Seattle/Tacoma Intl-CWL Cardiff Wales

18h 25m1 stop Amsterdam Schiphol

10:20 am - 11:05 amCWL Cardiff Wales-SEA Seattle/Tacoma Intl

32h 45m2 stops Amsterdam Schiphol Boston Logan Intl

$1,783Air Europa

Wed, Dec 23 - Wed, Dec 30

6:00 am - 9:45 amSEA Seattle/Tacoma Intl-CWL Cardiff Wales

19h 45m2 stops Minneapolis St Paul Amsterdam Schiphol

10:20 am - 11:05 amCWL Cardiff Wales-SEA Seattle/Tacoma Intl

32h 45m2 stops Amsterdam Schiphol Boston Logan Intl

$1,865Air Europa

Sat, Nov 28 - Sat, Dec 5

2:35 pm - 5:00 pmSEA Seattle/Tacoma Intl-CWL Cardiff Wales

18h 25m1 stop Amsterdam Schiphol

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

26h 20m1 stop Amsterdam Schiphol

$2,153KLM

Booking Insights

Price, demand and travel trends for Seattle to Cardiff flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

Prices

Airlines

Layovers

How much is a round-trip flight from Seattle to Cardiff? This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Seattle to Cardiff departing in november.

Find deals

Cheapest flight	$1,198

Round-trip flight from Seattle to Cardiff

When to book flights from Seattle to Cardiff

Are your dates flexible? Find out the best times to travel from Seattle to Cardiff based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

What cabin classes can I book on flights from Seattle to Cardiff?
Only Economy Class is available on flights from Seattle to Cardiff.
Do I need a passport to fly from Seattle to Cardiff?
Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.
How much should I expect to pay for a Seattle to Cardiff flight?
Round-trip flights from Seattle to Cardiff range from $1,521 to $1,698, with an average of $1,532 over the past 12 months. Anything below $1,521 counts as a good deal.
Have flight prices from Seattle to Cardiff changed much recently?
Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $1,093 to $9,812. That means the highest observed fare was about 9x higher than the lowest one.
What car rental options are available at Cardiff Wales Airport (CWL)?
Cardiff Wales Airport (CWL) hosts 5 major car rental companies, with daily rates starting from around $15 for economy cars. Top options include:

• Alamo
• Budget
• Avis
• Enterprise Rent-A-Car
• National
Which airports can I use when flying from Seattle to Cardiff?
Flights from Seattle to Cardiff usually depart from Seattle/Tacoma Intl (SEA) and arrive at Cardiff Wales (CWL).
Which airports do connecting flights from Seattle to Cardiff pass through?
Most connecting flights from Seattle to Cardiff pass through Amsterdam Schiphol (AMS), which handles 100% of one-stop traffic on this route.
Can I save money by using flexible dates for flights from Seattle to Cardiff?
Yes. Flexible dates can save you up to 24% on flights from Seattle to Cardiff. Monday is the cheapest departure day at $1,172 round-trip on average, while Saturday is the most expensive at $1,532, a difference of $360.

KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.
What is the time difference between Seattle and Cardiff?
Cardiff is 8 hours ahead of Seattle (British Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

If your dates are flexible, aim for a Monday departure and avoid flying on Saturday. On this route, Monday flights average $1,172, about $360 less than Saturday fares (23% savings) based on the last 12 months.

More options for your flight from Seattle to Cardiff

Add a hotel or car rental

Airports

Cabin class

Direct Flights

Origins

Other destinations

Complete your trip to Cardiff with a hotel stay or car rental

Car rentals in Cardiff

Hotels in Cardiff

SEA - CWL

$1,198 Find Cheap Flights from Seattle to Cardiff - Compare and Save

Everything you should know

Cheap Flights from Seattle to Cardiff (SEA-CWL)

Recent round-trip flight deals from Seattle to Cardiff

Recent one-way flight deals from Seattle to Cardiff

Price, demand and travel trends for Seattle to Cardiff flights

How much is a round-trip flight from Seattle to Cardiff?

Which airline is the cheapest to fly from Seattle to Cardiff?

What is the cheapest layover airport when flying from Seattle to Cardiff?

When flying from Seattle to Cardiff which airport offers the shortest layover?

Key details for Seattle to Cardiff flights

Cheapest flight

When to book flights from Seattle to Cardiff

Your Seattle to Cardiff flight questions, answered

Your guide to booking Seattle to Cardiff flights

More options for your flight from Seattle to Cardiff

Complete your trip to Cardiff with a hotel stay or car rental

Information on your arrival and departure airports

Cabin class types available on flights from Seattle to Cardiff

Find direct flights to and from Seattle and Cardiff

Flights from domestic origins to Cardiff

Flights to other popular destinations