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$659+ Cheap flights from Seattle (SEA) to London, ON (YXU)

SEA — YXU
Dec 6 — Dec 131
Sun 12/6
Sun 12/13
1 adult, Economy
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1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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3. Compare prices and book

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Cheap flight deals from Seattle to London

Cheapest flights from Seattle to London

Wed 12/164:58 pm -
2 stops18h 07m
Wed 12/236:15 am -
1 stop31h 34m
Deal found 11/1$659
Fri 12/182:30 pm -
1 stop12h 05m
Fri 12/256:40 am -
2 stops58h 13m
Deal found 11/3$885
Wed 12/162:30 pm -
3 stops28h 22m
Wed 12/233:25 pm -
1 stop8h 34m
Deal found 11/1$1,074
Sat 12/197:47 pm -
2 stops30h 48m
Sat 12/266:40 am -
2 stops29h 50m
Deal found 11/3$1,119
Sat 11/147:45 am -
1 stop9h 42m
Mon 11/163:25 pm -
1 stop8h 34m
Deal found 11/1$1,122
Fri 12/186:34 am -
2 stops23h 03m
Fri 12/255:30 am -
3 stops18h 32m
Deal found 11/3$1,238

Find flight deals from Seattle to London

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$659
(Kiwi.com)
Provider with most accurate pricing for Seattle/Tacoma Intl-London flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-London flights.
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From Seattle/Tacoma Intl to London
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Seattle to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Wed 12/16

4:58 pm-2:05 pm

2 stops18h 07m

London

Wed 12/23

6:15 am-10:49 am

1 stop31h 34m

$659

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Fri 12/18

2:30 pm-5:35 am

1 stop12h 05m

London

Fri 12/25

6:40 am-1:53 pm

2 stops58h 13m

$885
Quickest round-trip

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Tue 1/12

8:40 am-9:52 pm

2 stops10h 12m

London

Sat 1/16

3:20 pm-8:59 pm

1 stop8h 39m

$977

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Wed 12/16

2:30 pm-9:52 pm

3 stops28h 22m

London

Wed 12/23

3:25 pm-8:59 pm

1 stop8h 34m

$1,074

SeattleLondon

SEA Seattle/Tacoma Intl - YXU London

SEAYXU

Seattle/Tacoma Intl

Fri 12/18

6:34 am-8:37 am

2 stops23h 03m

London

Fri 12/25

5:30 am-9:02 pm

3 stops18h 32m

$1,238

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/1

Sorted by cheapest first

Compare providers for flights from Seattle to London

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to London in November.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-London, Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-London, Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-London, Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-London, Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-London, Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to London

Have a flexible travel schedule? Discover the best time to fly to London from Seattle with our price prediction graph.
Estimated round-trip price

Related info for your journey

  • How long is the flight from Seattle to London, Ontario?

    For as low as $977, WestJet can have you in London, Ontario from Seattle in 10h 12m. There are 2000 mi between Seattle and London, Ontario. This flight may include one or multiple stops.

  • Can I find deals for flights from Seattle to London that include hotel bookings?

    Yes. In addition to deals on Seattle to London flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to London.

  • Can I find deals for business class flights from Seattle to London?

    Yes. Cheapflights offers flight deals from Seattle to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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