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Good to Know - Flights from Seattle to London

Low Season:
February
Best time to beat the crowds
High Season:
January
Most popular time to fly
Good Deal:
$ 560.80
or less (round trip)

Cheapest Day of the Month to Book Flights



Top Tips for Finding Cheap Flights from Seattle to London

Looking for cheap airfare from Seattle to London? 25% of our users found round-trip tickets to London for the following price or less: $ 560.80 Book at least 4 weeks before departure in order to get a below-average price. High season is considered to be January. The cheapest month to fly from Seattle to London is February. Enter your preferred departure airport and travel dates into the search form above to unlock the latest Seattle to London flight deals.

FAQs - Booking from Seattle to London flights

How long is the flight from Seattle to London?
A flight from Seattle to London takes 13hours5minutes.
What is the cheapest flight Seattle to London?:
The cheapest flight Seattle to London found on flyus.com in the last 72 hours was $560.80 round-trip.
 
Which airlines fly to London?:
• Icelandair
• Aer Lingus P.L.C.
• Condor Flugdienst
• Ethiopian Air Lines
• TAP Air Portugal
• American Airlines
• British Airways
• Iberia
• Lufthansa
• SWISS
 

Find cheap flights from Seattle to London and book discounted airfare from different cities all over the United States. Explore airline ticket deals on flight routes all over the World! At Flyus, we take pride in helping you discover and book the best flight deals for your next trip at the cheapest price. We make booking flights from different departures easy and provide you with peace of mind with our Best Purchase Guarantee.

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Cheapest Flights
from Seattle, United States (SEA) to:

  • London, United Kingdom (LHR)
    Mar 24, 25 - Mar 30, 25
    $560.80
    Search

  • London, United Kingdom (LHR)
    Mar 13, 25 - Apr 15, 25
    $576.61
    Search

  • London, United Kingdom (LHR)
    Feb 10, 25 - Feb 19, 25
    $588.43
    Search

  • London, United Kingdom (LHR)
    Apr 02, 25 - Apr 09, 25
    $607.61
    Search

  • London, United Kingdom (LHR)
    Apr 01, 25 - Apr 09, 25
    $607.61
    Search