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

Friday, September 18th, 2026

3 round-trip options

Returning
Wed, Sep 23, 2026•5 Day Trip
$905 USD
Google Flights
Returning
Mon, Sep 28, 2026•10 Day Trip
$762 USD
Google Flights
Returning
Wed, Sep 30, 2026•12 Day Trip
$797 USD
Google Flights