SEA - YXU

C$ 375 Find Cheap Flights from Seattle to London

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to London departing on 27/4. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags

Search hundreds of travel sites at once for deals on flights to London

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to London, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to London, as well as popular online travel agencies
In the last 7 days, travellers have searched 41,299,237 times on KAYAK, and here is why:

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Cheap Flight Deals from Seattle to London (SEA-YXU)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to London that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Seattle to London

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Seattle to London.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
3:15 p.m. - 7:13 p.m.SEA-YXU
24h 58m1 stop
8:00 p.m. - 2:21 p.m.YXU-SEA
21h 21m1 stop
C$ 558WestJet
Find Deal
Tue, 4 Feb - Tue, 11 Feb
3:15 p.m. - 7:13 p.m.SEA-YXU
24h 58m1 stop
8:00 p.m. - 2:21 p.m.YXU-SEA
21h 21m1 stop
C$ 578WestJet
Find Deal
Tue, 4 Feb - Tue, 11 Feb
3:15 p.m. - 7:13 p.m.SEA-YXU
24h 58m1 stop
8:00 p.m. - 7:13 a.m.YXU-SEA
14h 13m2 stops
C$ 595
Find Deal
Tue, 4 Feb - Tue, 11 Feb
10:51 p.m. - 7:13 p.m.SEA-YXU
17h 22m2 stops
8:00 p.m. - 7:13 a.m.YXU-SEA
14h 13m2 stops
C$ 652
Find Deal
Tue, 4 Feb - Tue, 11 Feb
7:05 a.m. - 7:09 p.m.SEA-YXU
9h 04m1 stop
8:00 p.m. - 1:08 p.m.YXU-SEA
20h 08m1 stop
C$ 671WestJet
Find Deal
Sat, 31 May - Sat, 7 Jun
7:05 a.m. - 7:09 p.m.SEA-YXU
9h 04m1 stop
8:00 p.m. - 12:31 p.m.YXU-SEA
19h 31m2 stops
C$ 674WestJet
Find Deal
Sat, 31 May - Sat, 7 Jun
7:00 a.m. - 8:20 p.m.SEA-YXU
10h 20m2 stops
3:25 p.m. - 9:30 p.m.YXU-SEA
9h 05m1 stop
C$ 704Air Canada
Find Deal
Wed, 5 Feb - Wed, 12 Feb
11:59 p.m. - 8:20 p.m.SEA-YXU
17h 21m2 stops
5:45 a.m. - 2:30 p.m.YXU-SEA
11h 45m2 stops
C$ 710Air Canada
Find Deal
Wed, 5 Feb - Wed, 12 Feb
11:17 p.m. - 2:50 p.m.SEA-YXU
12h 33m2 stops
3:25 p.m. - 9:30 p.m.YXU-SEA
9h 05m1 stop
C$ 793United Airlines
Find Deal
Tue, 4 Feb - Tue, 11 Feb
9:20 a.m. - 9:15 a.m.SEA-YXU
20h 55m3 stops
3:25 p.m. - 9:30 p.m.YXU-SEA
9h 05m1 stop
C$ 800United Airlines
Find Deal
Tue, 4 Feb - Tue, 11 Feb

Flights from Seattle to London - Travel Insights & Trends

Get data-powered insights and trends into flights from Seattle to London to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Seattle to London?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the past 3 days, the cheapest round-trip tickets from Seattle to London were found on WestJet (C$ 558) and Air Canada (C$ 704).

Good to know

Cheapest flight

C$ 375
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.

FAQs for booking flights from Seattle to London

  • What is the cheapest flight from Seattle to London?

    In the last 3 days, the lowest price for a flight from Seattle to London was C$ 261 for a one-way ticket and C$ 388 for a round-trip.

  • Which aircraft models fly most regularly from Seattle to London?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seattle to London?

    Star Alliance is the only airline alliance operating flights between Seattle and London.

  • How does KAYAK find such low prices on flights from Seattle to London?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to London.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to London?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to London?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London with an airline and back to Seattle with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to London?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Book cheap flights from Seattle to London

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Seattle to London found on KAYAK in the last 72 hours.
27/4Sun
2 stopsUnited Airlines
10h 18mSEA-YXU
C$ 375
27/4Sun
1 stopAir Canada
11h 13mSEA-YXU
C$ 399
27/4Sun
3 stopsUnited Airlines
20h 24mSEA-YXU
C$ 796

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Everything you need to know for your flight from Seattle to London

Information on your arrival and departure airports

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