Cheap flights from Seattle to London
from 298 US$
From 712 USD — compare hundreds of airlines
The cheapest month is usually 2026-09 · 298 US$
See prices for my dates →Live fares from 100+ sites — free, with no hidden fees.
About this route
Compare flights from Seattle to London, a about 7,707 km route (around 10h 8m nonstop). We gather live prices from hundreds of airlines and agencies so you can find the cheapest and book on the official site, with no hidden fees. Direct flights are available. Airlines such as American Airlines, British Airways, Iberia operate this route.
When to buy and when to fly
Prices by date
Fares found by date — cheapest days in green.
How to get the best price
Airlines on this route
FAQ
What's the cheapest month to fly Seattle to London?
It's usually 2026-09, from 298 USD. Use the price calendar to compare other dates.
How long is the flight from Seattle to London?
A nonstop flight takes about 10h 8m and covers around 7,707 km. Connecting itineraries take longer.
Are there direct flights from Seattle to London?
Yes, this route has nonstop flights. Filter by "nonstop" to see them.
Which airlines fly from Seattle to London?
American Airlines, British Airways, Iberia operate this route, among others. Compare them all in the results.
When should I book Seattle–London flights?
As a rule of thumb, booking 3–8 weeks ahead and avoiding weekends and holidays tends to give the best prices. Use the calendar to spot the cheapest dates.
Compare your dates in seconds
Seattle → London · Live fares from 100+ sites — free, with no hidden fees.