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).

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

Connecting flights from Seattle to London most commonly pass through: • Toronto Pearson Intl (YYZ) – 60% of one-stop connections • Calgary (YYC) – 40% of one-stop connections

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

Yes. Flexible dates can save you up to 13% on flights from Seattle to London. Friday is the cheapest departure day at C$ 787 round-trip on average, while Wednesday is the most expensive at C$ 897, a difference of C$ 110. KAYAK's flexible dates feature shows options up to three days before and after your selected dates, making it easier to compare nearby fares.

How long does a flight from Seattle to London take?

There are currently no direct flights available from Seattle to London. Flights with 1 layover take between 8h 38m and 11h 56m in total, depending on the connection.

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 C$ 878 to C$ 3,076. That means the highest observed fare was about 4x higher than the lowest one.

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

Flying via Toronto Pearson Intl (YYZ) gives the shortest average 1-stop total travel time at 8h 38m, compared with 11h 56m 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 averaging C$ 84 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 C$ 787 to C$ 898, with an average of C$ 883 over the past 12 months. Anything below C$ 787 counts as a good deal.

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

Air Canada (C$ 1,328) offered the cheapest round-trip ticket from Seattle to London in the last 5 days.

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

Toronto Pearson Intl (YYZ) is the most popular layover for the Seattle to London route. 60% of KAYAK users who booked 1-stop round-trips over the past 3 months connected via 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 C$ 685. 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 5h 53m over the past three months.

Cheap Flights from Seattle to London | KAYAK

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Cheapest round-trip

C$ 878

Typical prices: C$ 787-C$ 898

Multiple Airlines

Thu 13/12Thu 20/12

SEA - YXU • 2 stops

Top layover airports

Calgary (YYC)

Cheapest • Avg C$ 685 (round-trip)

Toronto Pearson Intl (YYZ)

Shortest trip • 8h 38m (one-way)

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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

Recent round-trip flight deals from Seattle to London

Sun, 13 Dec - Sun, 20 Dec

10:35 a.m. - 5:45 p.m.SEA Seattle/Tacoma Intl-YXU London

28h 10m2 stops San Diego Fort Lauderdale

6:15 a.m. - 10:49 a.m.YXU London-SEA Seattle/Tacoma Intl

31h 34m1 stop Fort Lauderdale

C$ 878Multiple Airlines

Sun, 13 Dec - Sun, 20 Dec

9:29 p.m. - 5:45 p.m.SEA Seattle/Tacoma Intl-YXU London

17h 16m1 stop Fort Lauderdale

6:15 a.m. - 10:49 a.m.YXU London-SEA Seattle/Tacoma Intl

31h 34m1 stop Fort Lauderdale

C$ 909Multiple Airlines

Wed, 16 Dec - Wed, 23 Dec

4:58 p.m. - 2:05 p.m.SEA Seattle/Tacoma Intl-YXU London

18h 07m2 stops Denver Intl Orlando

6:15 a.m. - 10:49 a.m.YXU London-SEA Seattle/Tacoma Intl

31h 34m1 stop Fort Lauderdale

C$ 921Multiple Airlines

Wed, 16 Dec - Wed, 23 Dec

2:30 p.m. - 5:35 a.m.SEA Seattle/Tacoma Intl-YXU London

12h 05m1 stop Calgary

6:15 a.m. - 9:56 p.m.YXU London-SEA Seattle/Tacoma Intl

18h 41m1 stop Fort Lauderdale

C$ 1,015Multiple Airlines

Sun, 13 Dec - Sun, 20 Dec

9:09 p.m. - 5:35 a.m.SEA Seattle/Tacoma Intl-YXU London

29h 26m3 stops Las Vegas Harry Reid Intl Phoenix Sky Harbor Intl Calgary

6:15 a.m. - 12:22 p.m.YXU London-SEA Seattle/Tacoma Intl

33h 07m3 stops Fort Lauderdale Atlanta Hartsfield-Jackson Denver Intl

C$ 1,086Multiple Airlines

Sun, 13 Dec - Sun, 20 Dec

9:09 p.m. - 5:35 a.m.SEA Seattle/Tacoma Intl-YXU London

29h 26m3 stops Las Vegas Harry Reid Intl Phoenix Sky Harbor Intl Calgary

6:15 a.m. - 10:51 p.m.YXU London-SEA Seattle/Tacoma Intl

19h 36m2 stops Fort Lauderdale Minneapolis St Paul

C$ 1,101Multiple Airlines

Sun, 13 Dec - Sun, 20 Dec

2:30 p.m. - 5:35 a.m.SEA Seattle/Tacoma Intl-YXU London

12h 05m1 stop Calgary

6:15 a.m. - 12:22 p.m.YXU London-SEA Seattle/Tacoma Intl

33h 07m3 stops Fort Lauderdale Atlanta Hartsfield-Jackson Denver Intl

C$ 1,234Multiple Airlines

Sat, 14 Nov - Mon, 16 Nov

7:05 p.m. - 2:42 p.m.SEA Seattle/Tacoma Intl-YXU London

16h 37m2 stops Vancouver Intl Toronto Pearson Intl

3:25 p.m. - 8:59 p.m.YXU London-SEA Seattle/Tacoma Intl

8h 34m1 stop Toronto Pearson Intl

C$ 1,328Air Canada

Sat, 14 Nov - Mon, 16 Nov

7:05 p.m. - 2:42 p.m.SEA Seattle/Tacoma Intl-YXU London

16h 37m2 stops Vancouver Intl Toronto Pearson Intl

3:25 p.m. - 8:59 p.m.YXU London-SEA Seattle/Tacoma Intl

8h 34m1 stop Toronto Pearson Intl

C$ 1,329Air Canada

Sat, 14 Nov - Mon, 16 Nov

7:05 p.m. - 2:42 p.m.SEA Seattle/Tacoma Intl-YXU London

16h 37m2 stops Vancouver Intl Toronto Pearson Intl

3:25 p.m. - 9:32 a.m.YXU London-SEA Seattle/Tacoma Intl

21h 07m2 stops Toronto Pearson Intl Vancouver Intl

C$ 1,363Air Canada

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 with more confidence.

Airlines

Layovers

Which airline is the cheapest to fly from Seattle to London?: Air Canada (C$ 1,328) offered the cheapest round-trip ticket from Seattle to London in the last 5 days.

Find deals

Cheapest flight	C$ 878

Round-trip 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.

How long does a flight from Seattle to London take?
There are currently no direct flights available from Seattle to London. Flights with 1 layover take between 8h 38m and 11h 56m in total, depending on the connection.
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.
How much should I expect to pay for a Seattle to London flight?
Round-trip flights from Seattle to London range from C$ 787 to C$ 898, with an average of C$ 883 over the past 12 months. Anything below C$ 787 counts as a good deal.
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 C$ 878 to C$ 3,076. That means the highest observed fare was about 4x higher than the lowest one.
What car rental options are available at London Airport (YXU)?
London Airport (YXU) hosts 5 major car rental companies, with daily rates averaging C$ 84 for economy cars. Top options include:

• Alamo
• Enterprise Rent-A-Car
• Budget
• National
• Avis
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).
Which airports do connecting flights from Seattle to London pass through?
Connecting flights from Seattle to London most commonly pass through:

• Toronto Pearson Intl (YYZ) – 60% of one-stop connections
• Calgary (YYC) – 40% of one-stop connections
Can I save money by using flexible dates for flights from Seattle to London?
Yes. Flexible dates can save you up to 13% on flights from Seattle to London. Friday is the cheapest departure day at C$ 787 round-trip on average, while Wednesday is the most expensive at C$ 897, a difference of C$ 110.

KAYAK's flexible dates feature shows options up to three days before and after your selected dates, making it easier to compare nearby fares.
How much time can I save by choosing a different layover airport when travelling from Seattle to London?
Flying via Toronto Pearson Intl (YYZ) gives the shortest average 1-stop total travel time at 8h 38m, compared with 11h 56m 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.

If your dates are flexible, aim for a Friday departure and avoid flying on Wednesday. On this route, Friday flights average C$ 787, about C$ 110 less than Wednesday fares (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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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

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

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

What’s 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

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