London Heathrow (LHR) to Seattle / Tacoma (SEA) flight deal in economy from $713

Alaska Airlines, Inc.ASAlaska Airlines, Inc.
Round Trip•Economy
United KingdomLHR

London Heathrow Airport

London Heathrow, United Kingdom
United StatesSEA

Seattle–Tacoma International Airport

Seattle / Tacoma, United States
$900 USD
-21%$713 USD
Verified about 13 hours ago
Good Availability
48% of dates checked are available within 10% of the lowest price

Thursday, August 20th, 2026

4 round-trip options

Returning
Tue, Aug 25, 2026•5 Day Trip
$945 USD
Google Flights
Returning
Thu, Aug 27, 2026•7 Day Trip
$973 USD
Google Flights
Returning
Sat, Aug 29, 2026•9 Day Trip
$945 USD
Google Flights
Returning
Thu, Sep 3, 2026•14 Day Trip
$1,077 USD
Google Flights