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Cheap SEA to LHR Flights

Prices were available within the past 7 days and starts at CA $862 for one-way flights and CA $1,212 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Seattle to London route information

Origin Airport Seattle - Tacoma Intl.
Destination Airport Heathrow
Flight Price CA $1,212
Distance 7,657 km

Cheap SEA to LHR Flights

Seattle to London Flights

How Expedia save you money on your flight?

One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free!

Flight deals with Expedia


How to find cheap flights with Expedia?

When it comes to finding cheap Expedia flights, the best time to do it is during low season or shoulder season, which ranges between late January to May.

Book a cheap flight with Expedia

Jul 29, 2018

Very pleased

Mar 19, 2018

Great service and flight!

Mar 19, 2018

Enjoyed our flight immensely 😊

Jun 6, 2017

Cabin staff exceptionally pleasant and helpful.