How much do flights from San Francisco to London cost?

Round-trip fares from San Francisco to London have recently been found around $701. That's 25% above the historical average. Prices are checked multiple times daily.

When is the best time to fly to London?

Right now is notable because: Summer Bank Holiday. The current travel window is Aug 31 – Aug 31, and London has a GO Score of 67/100.

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 San Francisco to London?

Most flights from San Francisco 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 San Francisco have been found from around $701. Our GO Score updates daily and flags when prices drop below average — bookmark this page to catch the cheapest window.