How much do flights from Seattle to London cost?

Round-trip fares from Seattle to London have recently been found around $573. Prices are checked multiple times daily.

When is the best time to fly to London?

Right now is notable because: Wimbledon Championships. The current travel window is Jun 29 – Jul 12, and London has a GO Score of 59/100.

Is London safe to visit?

London is a popular travel destination, but safety depends on the specific area and current local conditions. Always check your government's official travel advisories before booking, and follow local guidance once on the ground. Our GO Score tracks flights, weather, currency, and events — not safety directly.

How many hours is the flight from Seattle to London?

Most flights from Seattle to London take 6 to 10 hours, depending on the route, layovers, and whether you fly direct. Check individual airline listings for the exact flight duration from your chosen airport.

What's the cheapest month to visit London?

Flight prices to London fluctuate throughout the year. Recent fares from Seattle have been found from around $573. Our GO Score updates daily and flags when prices drop below average — bookmark this page to catch the cheapest window.