Seattle / Tacoma (SEA) to London Heathrow (LHR) flight deal in economy from $325

ASAlaska Airlines, Inc.

One Way•Economy

SEA

Seattle–Tacoma International Airport

Seattle / Tacoma, United States

LHR

London Heathrow Airport

London Heathrow, United Kingdom

$409 USD

-21%$325 USD

Verified 12 days ago

October 2026

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28$37429$37430$3741$4242$4243$3754$3255$3256$3257$3258$3759$37510$37511$32512$32513$32514$32515$37516$37517$37518$32519$32520$32521$32522$37523$37524$37525$32526$32527$32528$32529$37530$37531$3751$325

Fair Availability

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

Sunday, October 4th, 2026

Outbound Flights

9h 20m·Nonstop

$325 USD

SEAOct 4 21:45

→

LHROct 5 15:05

AS 100Boeing 787

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