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

Friday, December 18th, 2026

3 round-trip options

Returning
Thu, Dec 24, 2026•6 Day Trip
$765 USD
Google Flights
Returning
Fri, Dec 25, 2026•7 Day Trip
$765 USD
Google Flights
Returning
Fri, Jan 1, 2027•14 Day Trip
$719 USD
Google Flights