SEA to LHR from $325 in economy – flightdeals.net

Home Premium Fare Deals About

Alaska Airlines, Inc.

ASAlaska Airlines, Inc.

One Way•Economy

Seattle–Tacoma International Airport

Seattle / Tacoma, United States

London Heathrow Airport

London Heathrow, United Kingdom

$409 USD

-21%$325 USD

Verified 14 days ago

July 2026

Mon

Tue

Wed

Thu

Fri

Sat

Sun

29 30 1 2 3 4 5$719 6$719 7$719 8$719 9$779 10$779 11$779 12$719 13$719 14$719 15$719 16$779 17$779 18$739 19$689 20$689 21$689 22$689 23$739 24$739 25$739 26$689 27$689 28$689 29$689 30$739 31$739 1$739 2$374

Fair Availability

36% of dates checked are available within 10% of the lowest price

Wednesday, July 1st, 2026

No flight details available for this date.