Flights

Flights from Seattle to London

Fares we've seen from Seattle (SEA) to London (LHR) start from US$386 on 11 Dec 2026 with Frontier. Prices come from partner searches in the last 48 hours and change quickly, so look before you book.

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Compare Seattle to London on your dates and see current fares from our sources, listed by price.

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Fares by month

Month	Seen from	Date	Airline
October 2026	US$465	15 Oct 2026	WestJet · 1 stop	Check now
December 2026	US$386	11 Dec 2026	Frontier · 2 stops	Check now

One-way fares in US dollars, last seen on Aviasales. They can change at any time and may not be available on every day of the month. Partner links: we may earn a commission if you book, at no extra cost to you.

Airlines on this route

Airlines we've seen with fares on this route, listed by price:

Frontier: from US$386 (with a stop)
WestJet: from US$465 (with a stop)
Condor: from US$698 (with a stop)
United: from US$732 (with a stop)

Plan the rest of your trip to London

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Questions about Seattle to London flights

How much do flights from Seattle to London cost? Fares we've seen start from US$386 on 11 Dec 2026 with Frontier. Fares change quickly, so look before you book.

When can I save on flights from Seattle to London? Among the next six months we checked, December 2026 had fares from US$386 in our data, while October 2026 reached US$465. Prices vary by date, so compare several days and save.

Which airlines fly from Seattle to London? We've seen fares from Frontier, WestJet, Condor, United. This reflects recent searches, not a complete timetable.

Are there direct flights from Seattle to London? Among 4 recent fares we saw no direct flights, so most itineraries include a stop. Check the booking page for the full options.

Is FindMyFlight free to use? Yes. We never add anything to the fare. If you book through a partner link we may earn a commission from the partner, at no extra cost to you.