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

Thursday, December 17th, 2026

3 round-trip options

Returning
Wed, Dec 23, 2026•6 Day Trip
$763 USD
Google Flights
Returning
Thu, Dec 24, 2026•7 Day Trip
$763 USD
Google Flights
Returning
Thu, Dec 31, 2026•14 Day Trip
$799 USD
Google Flights