Cheapest month to fly from Seattle to London
The lowest fare travelers recently found for each month of the next year, SEA to LHR.
Cheapest month
Lowest fare found departs Fri, Nov 6.
See prices for Fri, Nov 6- November 2026$897See prices
Cached data from Aviasales (via Travelpayouts), up to a few days old. A month with no bar had no recent fares. It may include extra stops, and a price may be gone. It is a starting point, not a quote. Some links are partner links; we may earn a commission at no extra cost to you. Details
Questions
What is the cheapest month to fly from Seattle to London?
Among the fares travelers recently found, November 2026 is lowest at about $897. These are cached, recently found fares, not guarantees.
Are these prices guaranteed?
No. They are low fares travelers recently found, up to a few days old, and they may be gone. Open a month to see the live prices from the seller.
Can I get an alert if the price drops?
Yes. Search your trip and choose Get a price alert, or sign up below for a free weekly email of cheap flights.