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

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

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

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

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

Most connecting flights from Cardiff to Seattle pass through Amsterdam Schiphol (AMS), which handles 100% of one-stop traffic on this route. Other stopover airports each see under 5%.

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

Yes. Being flexible with your travel dates can save you up to 60% on the Cardiff to Seattle route. Friday is the cheapest departure day at £888 return on average, while Wednesday is the most expensive at £2,220, a difference of £1,332. 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 popular places can I visit in Seattle?

Some of the most popular sights in Seattle are Pier 66, The Westin Seattle, and Seattle Center. These are among the most viewed places in Seattle on KAYAK.

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

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 Cardiff to Seattle changed much recently?

Yes. Based on fares seen in the past 5 days, return flight prices on this route showed a wide range, from about £570 to £2,063. That means the highest observed fare was about 4x higher than the lowest one.

How are flight prices from Cardiff to Seattle looking right now?

One-way fares from Cardiff to Seattle are currently lower than usual. Average one-way flight prices are about £511, which is 56% below the typical average for this route.

What is the time difference between Cardiff and Seattle?

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

Which car hire options are available at Seattle/Tacoma Intl Airport (SEA)?

Seattle/Tacoma Intl Airport (SEA) hosts 5 major car hire companies, with daily rates starting from around £3 for economy cars. Top options include: • Fox • Europcar • Thrifty • Budget • Dollar

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

Flights via Amsterdam Schiphol (AMS) offer the most affordable fares, with an average return price of £708. Based on KAYAK data over the past 3 months.

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

Amsterdam Schiphol (AMS) had the shortest average connection time for Cardiff to Seattle stopovers at 567 minutes over the past 3 months.

£399 CHEAP FLIGHTS from Cardiff to Seattle (CWL - SEA)

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Cheapest return flight

£570

Typical prices: £729-£2,221

Air France, KLM

Mon 22/10Mon 29/10

CWL - SEA • 1 stop

Cheapest one-way flight

£399

Typical prices: £377-£1,135

Multiple Airlines

Fri 28/9

CWL - SEA • 2 stops

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Flight Deals

Cheap Flights from Cardiff to Seattle (CWL-SEA)

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

Return

One-way

Recent return flight deals from Cardiff to Seattle

Thu, 22 Oct - Thu, 29 Oct

09:45 - 11:52CWL Cardiff Wales-SEA Seattle/Tacoma Intl

34h 07m1 stop Amsterdam Schiphol

08:25 - 09:50SEA Seattle/Tacoma Intl-CWL Cardiff Wales

18h 25m2 stops Minneapolis St Paul Amsterdam Schiphol

£570Multiple Airlines

Thu, 22 Oct - Thu, 29 Oct

09:45 - 22:49CWL Cardiff Wales-SEA Seattle/Tacoma Intl

21h 04m2 stops Amsterdam Schiphol Boston Logan Intl

08:25 - 09:50SEA Seattle/Tacoma Intl-CWL Cardiff Wales

18h 25m2 stops Minneapolis St Paul Amsterdam Schiphol

£591Delta

Thu, 22 Oct - Thu, 29 Oct

17:15 - 16:35CWL Cardiff Wales-SEA Seattle/Tacoma Intl

31h 20m1 stop Amsterdam Schiphol

15:25 - 17:00SEA Seattle/Tacoma Intl-CWL Cardiff Wales

18h 35m1 stop Amsterdam Schiphol

£631Multiple Airlines

Sat, 24 Oct - Sat, 31 Oct

09:45 - 16:35CWL Cardiff Wales-SEA Seattle/Tacoma Intl

14h 50m1 stop Amsterdam Schiphol

15:25 - 17:00SEA Seattle/Tacoma Intl-CWL Cardiff Wales

18h 35m1 stop Amsterdam Schiphol

£654Multiple Airlines

Sat, 24 Oct - Sat, 31 Oct

17:35 - 18:35CWL Cardiff Wales-SEA Seattle/Tacoma Intl

33h 00m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

15:25 - 17:00SEA Seattle/Tacoma Intl-CWL Cardiff Wales

18h 35m1 stop Amsterdam Schiphol

£791Virgin Atlantic

Sun, 25 Oct - Sun, 1 Nov

17:30 - 16:45CWL Cardiff Wales-SEA Seattle/Tacoma Intl

30h 15m2 stops Amsterdam Schiphol Portland

06:00 - 09:50SEA Seattle/Tacoma Intl-CWL Cardiff Wales

19h 50m2 stops Detroit Metropolitan Wayne County Amsterdam Schiphol

£881Virgin Atlantic

Sun, 25 Oct - Sun, 1 Nov

17:30 - 16:45CWL Cardiff Wales-SEA Seattle/Tacoma Intl

30h 15m2 stops Amsterdam Schiphol Portland

14:35 - 17:00SEA Seattle/Tacoma Intl-CWL Cardiff Wales

18h 25m1 stop Amsterdam Schiphol

£913Virgin Atlantic

Thu, 22 Oct - Thu, 29 Oct

17:15 - 16:00CWL Cardiff Wales-SEA Seattle/Tacoma Intl

30h 45m3 stops Amsterdam Schiphol Barcelona-El Prat Frankfurt am Main

15:35 - 09:50SEA Seattle/Tacoma Intl-CWL Cardiff Wales

35h 15m3 stops Reykjavik Keflavik Intl Kastrup Copenhagen Amsterdam Schiphol

£1,012Multiple Airlines

Thu, 22 Oct - Thu, 29 Oct

22:50 - 18:32CWL Cardiff Wales-SEA Seattle/Tacoma Intl

27h 42m2 stops Dublin Vancouver Intl

15:35 - 09:50SEA Seattle/Tacoma Intl-CWL Cardiff Wales

35h 15m3 stops Reykjavik Keflavik Intl Kastrup Copenhagen Amsterdam Schiphol

£1,070Multiple Airlines

Sat, 24 Oct - Sat, 31 Oct

07:30 - 18:45CWL Cardiff Wales-SEA Seattle/Tacoma Intl

19h 15m3 stops Dublin Vancouver Intl Calgary

15:35 - 13:55SEA Seattle/Tacoma Intl-CWL Cardiff Wales

15h 20m2 stops Reykjavik Keflavik Intl Dublin

£1,088Multiple Airlines

Booking Insights

Price, demand, and travel trends for Cardiff to Seattle flights

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

Airlines

Stopovers

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

Delta (£591) and KLM (£592) are the cheapest airlines to fly return from Cardiff to Seattle according to KAYAK data over the last 5 days.

Find deals

Cheapest flight	£399

Flights from Cardiff to Seattle

When to book flights from Cardiff to Seattle

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

Estimated return price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns 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.

Which airports can I use when flying from Cardiff to Seattle?
Flights from Cardiff to Seattle usually depart from Cardiff Wales (CWL) and arrive at Seattle/Tacoma Intl (SEA).
Which cabin classes can I book on flights from Cardiff to Seattle?
Only Economy class is available on flights from Cardiff to Seattle.
Which airports do connecting flights from Cardiff to Seattle pass through?
Most connecting flights from Cardiff to Seattle pass through Amsterdam Schiphol (AMS), which handles 100% of one-stop traffic on this route. Other stopover airports each see under 5%.
Can I save money by using flexible dates for flights from Cardiff to Seattle?
Yes. Being flexible with your travel dates can save you up to 60% on the Cardiff to Seattle route. Friday is the cheapest departure day at £888 return on average, while Wednesday is the most expensive at £2,220, a difference of £1,332. 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 popular places can I visit in Seattle?
Some of the most popular sights in Seattle are Pier 66, The Westin Seattle, and Seattle Center. These are among the most viewed places in Seattle on KAYAK.
Do I need a passport to fly from Cardiff to Seattle?
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 Cardiff to Seattle changed much recently?
Yes. Based on fares seen in the past 5 days, return flight prices on this route showed a wide range, from about £570 to £2,063. That means the highest observed fare was about 4x higher than the lowest one.
How are flight prices from Cardiff to Seattle looking right now?
One-way fares from Cardiff to Seattle are currently lower than usual. Average one-way flight prices are about £511, which is 56% below the typical average for this route.
What is the time difference between Cardiff and Seattle?
Seattle is 8 hours behind Cardiff (Pacific Time vs British Time). Plan for the time shift when scheduling connections or first-day activities.
Which car hire options are available at Seattle/Tacoma Intl Airport (SEA)?
Seattle/Tacoma Intl Airport (SEA) hosts 5 major car hire companies, with daily rates starting from around £3 for economy cars. Top options include:
• Fox
• Europcar
• Thrifty
• Budget
• Dollar

If your dates are flexible, aim for a Friday departure instead of Wednesday. On this route, Friday flights average £888 – about £1,332 less than Wednesday (60% savings) based on the last 12 months.
If you're arriving late at night and need somewhere to stay, check out these hotels close to Seattle/Tacoma Intl Airport.
- Seattle Airport Marriott
- Coast Gateway Hotel
- Fairfield by Marriott Inn & Suites Seattle Sea-Tac Airport

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CWL - SEA

£399 Find Cheap Flights from Cardiff to Seattle – Compare and Save

Everything you should know

Cheap Flights from Cardiff to Seattle (CWL-SEA)

Recent return flight deals from Cardiff to Seattle

Recent one-way flight deals from Cardiff to Seattle

Price, demand, and travel trends for Cardiff to Seattle flights

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

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

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

Key details for Cardiff to Seattle flights

Cheapest flight

When to book flights from Cardiff to Seattle

Your Cardiff to Seattle flight questions, answered

Your guide to booking Cardiff to Seattle flights

More options for your flight from Cardiff to Seattle

Complete your trip to Seattle with a hotel stay or car hire

Information on your arrival and departure airports

Cabin class types available on flights from Cardiff to Seattle

Find direct flights to and from Cardiff and Seattle

Flights from domestic origins to Seattle

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