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

Flights from Seattle to London usually depart from Seattle/Tacoma Intl (SEA) and arrive at London (YXU).

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

Two cabin classes are available on flights from Seattle to London: • Economy Class • First Class

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

Connecting flights from Seattle to London most commonly pass through: • Calgary (YYC) - 50% of one-stop connections • Toronto Pearson Intl (YYZ) - 50% of one-stop connections Together, these airports account for 100% of one-stop bookings on this route.

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

Yes. Being flexible with your travel dates can save you up to 13% on the Seattle to London route. Friday is the cheapest departure day at $563 round-trip on average, while Wednesday is the most expensive at $642, a difference of $79. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

How long is a flight from Seattle to London?

A nonstop flight from Seattle to London takes 0h 00m, covering 2,000 miles.

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

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 London 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 $372 to $1,075. That means the highest observed fare was about 3x higher than the lowest one.

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

One-way fares from Seattle to London are currently lower than usual. Average one-way flight prices are about $244, which is 33% below the typical average for this route.

How much time can I save by choosing a different layover airport from Seattle to London?

Flying via Toronto Pearson Intl (YYZ) gives the shortest average 1-stop total travel time at 8h 38m, compared with 13h 29m via Calgary (YYC).

What is the time difference between Seattle and London?

London is 3 hours ahead of Seattle (Eastern Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

What car rental options are available at London Airport (YXU)?

London Airport (YXU) hosts 5 major car rental companies, with daily rates starting from around $28 for economy cars. Top options include: • Alamo • Enterprise Rent-A-Car • Budget • National • Avis

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

Round-trip flights from Seattle to London range from $563 to $642, with an average of $632 over the past 12 months. Anything below $563 counts as a good deal.

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

WestJet ($372) offered the cheapest round-trip ticket from Seattle to London in the last 5 days.

What is the most popular layover airport when flying from Seattle to London?

Calgary (YYC) and Toronto Pearson Intl (YYZ) are the most popular layovers for the Seattle to London route. 50% of KAYAK users who booked 1-stop round-trips over the past 3 months connected via YYC or YYZ.

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

Flights via Calgary (YYC) offer the most affordable fares, with an average round-trip price of $537. Based on KAYAK data over the past 3 months.

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

Toronto Pearson Intl (YYZ) had the shortest average connection time for Seattle to London layovers at 353 minutes over the past 3 months.

$153 CHEAP FLIGHTS from Seattle to London (SEA - YXU)

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Cheapest round-trip

$372

Typical prices: $563-$642

WestJet

Mon 10/15Tue 10/16

SEA - YXU • 1 stop

Cheapest one-way

$153

Typical prices: $190-$445

WestJet

Mon 10/15

SEA - YXU • 1 stop

Nonstop flights

Not available

There are currently no direct flights between Seattle and London. You'll need to take a connecting flight to reach the destination.

Insights

Top layover airports

Calgary (YYC)

Cheapest • Avg $537 (round-trip)

Toronto Pearson Intl (YYZ)

Shortest trip • 8h 38m (one-way)

Insights

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Flight Deals

Cheap Flights from Seattle to London (SEA-YXU)

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

Round-trip

One-way

Last minute

Recent round-trip flight deals from Seattle to London

Thu, Oct 15 - Fri, Oct 16

7:35 pm - 5:20 amSEA Seattle/Tacoma Intl-YXU London

6h 45m1 stop Calgary

5:55 pm - 9:40 amYXU London-SEA Seattle/Tacoma Intl

18h 45m1 stop Calgary

$372WestJet

Tue, Oct 20 - Sat, Oct 24

7:35 pm - 5:20 amSEA Seattle/Tacoma Intl-YXU London

6h 45m1 stop Calgary

6:10 am - 6:45 pmYXU London-SEA Seattle/Tacoma Intl

15h 35m1 stop Calgary

$416WestJet

Tue, Oct 27 - Tue, Nov 3

8:09 pm - 6:35 amSEA Seattle/Tacoma Intl-YXU London

31h 26m2 stops Los Angeles Los Angeles Calgary

6:40 am - 1:40 pmYXU London-SEA Seattle/Tacoma Intl

10h 00m1 stop Calgary

$455Multiple Airlines

Thu, Oct 15 - Mon, Oct 19

7:35 pm - 5:20 amSEA Seattle/Tacoma Intl-YXU London

6h 45m1 stop Calgary

6:10 am - 11:03 pmYXU London-SEA Seattle/Tacoma Intl

19h 53m2 stops Calgary San Francisco

$500Multiple Airlines

Thu, Oct 29 - Thu, Nov 5

8:09 pm - 6:35 amSEA Seattle/Tacoma Intl-YXU London

31h 26m2 stops Los Angeles Los Angeles Calgary

6:40 am - 1:40 pmYXU London-SEA Seattle/Tacoma Intl

10h 00m1 stop Calgary

$503Multiple Airlines

Tue, Oct 27 - Tue, Nov 3

8:02 am - 6:35 amSEA Seattle/Tacoma Intl-YXU London

19h 33m1 stop Calgary

6:40 am - 1:40 pmYXU London-SEA Seattle/Tacoma Intl

10h 00m1 stop Calgary

$517Multiple Airlines

Tue, Oct 20 - Sat, Oct 24

7:35 pm - 5:20 amSEA Seattle/Tacoma Intl-YXU London

6h 45m1 stop Calgary

6:10 am - 6:45 pmYXU London-SEA Seattle/Tacoma Intl

15h 35m1 stop Calgary

$518WestJet

Thu, Oct 15 - Mon, Oct 19

7:35 pm - 5:20 amSEA Seattle/Tacoma Intl-YXU London

6h 45m1 stop Calgary

5:55 pm - 7:49 pmYXU London-SEA Seattle/Tacoma Intl

28h 54m1 stop Calgary

$544Multiple Airlines

Fri, Oct 30 - Fri, Nov 6

3:30 pm - 6:35 amSEA Seattle/Tacoma Intl-YXU London

12h 05m1 stop Calgary

6:40 am - 2:44 pmYXU London-SEA Seattle/Tacoma Intl

35h 04m2 stops Calgary Vancouver Intl

$569Multiple Airlines

Thu, Oct 15 - Fri, Oct 16

11:20 am - 5:20 amSEA Seattle/Tacoma Intl-YXU London

15h 00m2 stops Vancouver Intl Calgary

5:55 pm - 9:40 amYXU London-SEA Seattle/Tacoma Intl

18h 45m1 stop Calgary

$575Multiple Airlines

Booking Insights

Price, demand and travel trends for Seattle to London flights

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

Prices

Airlines

Layovers

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

Round-trip flights from Seattle to London start at $372. Prices are below average for this route right now, with typical round-trip fares ranging from $563 to $642. The lowest price found in the past 5 days was $372 on WestJet.

Find deals

Cheapest flight	$153

Flight from Seattle to London

When to book flights from Seattle to London

Are your dates flexible? Find out the best times to travel from Seattle to London 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.

Which airports can I use when flying from Seattle to London?
Flights from Seattle to London usually depart from Seattle/Tacoma Intl (SEA) and arrive at London (YXU).
What cabin classes can I book on flights from Seattle to London?
Two cabin classes are available on flights from Seattle to London:

• Economy Class
• First Class
Which airports do connecting flights from Seattle to London pass through?
Connecting flights from Seattle to London most commonly pass through:

• Calgary (YYC) - 50% of one-stop connections
• Toronto Pearson Intl (YYZ) - 50% of one-stop connections
Together, these airports account for 100% of one-stop bookings on this route.
Can I save money by using flexible dates for flights from Seattle to London?
Yes. Being flexible with your travel dates can save you up to 13% on the Seattle to London route. Friday is the cheapest departure day at $563 round-trip on average, while Wednesday is the most expensive at $642, a difference of $79. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.
How long is a flight from Seattle to London?
A nonstop flight from Seattle to London takes 0h 00m, covering 2,000 miles.
Do I need a passport to fly from Seattle to London?
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 London 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 $372 to $1,075. That means the highest observed fare was about 3x higher than the lowest one.
How are flight prices from Seattle to London looking right now?
One-way fares from Seattle to London are currently lower than usual. Average one-way flight prices are about $244, which is 33% below the typical average for this route.
How much time can I save by choosing a different layover airport from Seattle to London?
Flying via Toronto Pearson Intl (YYZ) gives the shortest average 1-stop total travel time at 8h 38m, compared with 13h 29m via Calgary (YYC).
What is the time difference between Seattle and London?
London is 3 hours ahead of Seattle (Eastern Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.
What car rental options are available at London Airport (YXU)?
London Airport (YXU) hosts 5 major car rental companies, with daily rates starting from around $28 for economy cars. Top options include:
• Alamo
• Enterprise Rent-A-Car
• Budget
• National
• Avis
How much should I expect to pay for a Seattle to London flight?
Round-trip flights from Seattle to London range from $563 to $642, with an average of $632 over the past 12 months. Anything below $563 counts as a good deal.

If your dates can be flexible, aim for a Friday departure instead of Wednesday. On this route, Friday flights average $563 - about $79 less than Wednesday (12% 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 London Airport.
- Best Western London Airport Inn & Suites
- London residency inn

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SEA - YXU

$153 Find Cheap Flights from Seattle to London - Compare and Save

Everything you should know

Cheap Flights from Seattle to London (SEA-YXU)

Recent round-trip flight deals from Seattle to London

Recent one-way flight deals from Seattle to London

Recent last minute flight deals from Seattle to London

Price, demand and travel trends for Seattle to London flights

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

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

What is the most popular layover airport when flying from Seattle to London?

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

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

Key details for Seattle to London flights

Cheapest flight

When to book flights from Seattle to London

Your Seattle to London flight questions, answered

Your guide to booking Seattle to London flights

More options for your flight from Seattle to London

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

Information on your arrival and departure airports

Cabin class types available on flights from Seattle to London

Find direct flights to and from Seattle and London

Flights from domestic origins to London

Flights to other popular destinations

Find deals for your return flight