YXU - SEA

$189 Find Cheap Flights from London to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from London to Seattle departing on 9/15. 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
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Seattle, 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 London to Seattle, as well as popular online travel agencies
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Flights Deals

Cheap Flights from London to Seattle (YXU-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from London to Seattle 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.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from London to Seattle

Sat, Sep 20 - Tue, Sep 23
WestJet Logo
8:00 pm - 12:33 pmYXU-SEA
19h 33m2 stops
WestJet Logo
2:05 pm - 5:12 amSEA-YXU
12h 07m1 stop
$359WestJet
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Sat, Sep 20 - Tue, Sep 23
Air Canada Logo
10:00 am - 7:31 pmYXU-SEA
12h 31m2 stops
Air Canada Logo
7:15 pm - 9:19 amSEA-YXU
11h 04m2 stops
$401Air Canada
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Mon, Sep 15 - Mon, Sep 22
WestJet Logo
6:00 am - 12:59 pmYXU-SEA
9h 59m1 stop
WestJet Logo
7:05 am - 7:07 pmSEA-YXU
9h 02m1 stop
$460WestJet
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Mon, Sep 15 - Mon, Sep 22
United Airlines Logo
3:50 pm - 10:59 pmYXU-SEA
10h 09m2 stops
United Airlines Logo
4:55 pm - 3:17 pmSEA-YXU
19h 22m2 stops
$490United Airlines
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Mon, Sep 15 - Mon, Sep 22
United Airlines Logo
6:10 am - 10:59 amYXU-SEA
7h 49m1 stop
United Airlines Logo
5:14 pm - 9:19 amSEA-YXU
13h 05m2 stops
$579United Airlines
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Booking Insights

KAYAK's insights & trends for London to Seattle flights

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

What’s the cheapest day of the week to fly from London to Seattle?

The average price of all round-trip flights from London to Seattle clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from London to Seattle, look for departures on Saturdays and avoid leaving on a Monday, as it's usually the priciest day. When flying back from Seattle, Thursday is the cheapest day to fly and Tuesday is the most expensive.

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Good to know

Cheapest flight$189
Flight from London to Seattle

When to book flights from London to Seattle

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

  • What is the cheapest flight from London to Seattle?

    In the last 3 days, the lowest price for a flight from London to Seattle was $189 for a one-way ticket and $359 for a round-trip.

  • Do I need a passport to fly between London and Seattle?

    A passport is required to fly from London to Seattle.

  • Which airports will I be using when flying from London to Seattle?

    When flying out of London you will be using London. You will be landing at Seattle, also known as Seattle/Tacoma Intl.

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

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

  • Which airline alliances offer flights from London to Seattle?

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

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

    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 London to Seattle.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from London 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 London to Seattle?

    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 Seattle with an airline and back to London with another airline. Booking your flights between London and SEA can sometimes prove cheaper using this method.

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

    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 Seattle from London up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

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

Information on your arrival and departure airports

London (YXU)
Seattle (SEA)

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