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Cheap flights from Seattle to London

Fares from $243 in November 2026. Compare every month below, then book with the site you like.

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Cheapest Seattle to London fares by month

Lowest price per person found in recent searches. Prices change often and are checked when you book.

Seattle to London at a glance

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Frequently asked questions

How much is a flight from Seattle to London?
The cheapest fare we found recently is $243 per person, departing Nov 25 on FI. Prices change daily, so search your dates to see today's fares.
What is the cheapest month to fly from Seattle to London?
November 2026 is currently the cheapest month, from $243. January 2027 is the most expensive, from $331.
Are there direct flights from Seattle to London?
The cheapest fares we found recently have at least one stop. Nonstop flights may still exist at a higher price; tick "Direct only" in the search to check.
Which airlines fly from Seattle to London?
The cheapest recent fares on this route were on FI, Air Canada.
How long is the flight from Seattle to London?
Seattle and London are about 4,786 miles apart, so a nonstop flight takes roughly 10h 45m. Flights with a stop take longer, depending on the connection.
Do I need a passport to fly from Seattle to London?
Yes. London is in United Kingdom, so you need a valid passport, and some countries also ask for a visa or an online travel authorization. Check the entry rules for your nationality before you book.
How do I find the cheapest flight from Seattle to London?
Search your dates on Gotoesy. We list fares from several booking sites sorted cheapest first, show nearby dates when your day has no saved fare, and send you straight to the seller to book.

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