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 15 hours ago
Good Availability
48% of dates checked are available within 10% of the lowest price

Wednesday, December 30th, 2026

3 round-trip options

Returning
Tue, Jan 5, 2027•6 Day Trip
$855 USD
Google Flights
Returning
Wed, Jan 6, 2027•7 Day Trip
$855 USD
Google Flights
Returning
Wed, Jan 13, 2027•14 Day Trip
$857 USD
Google Flights