Cheap flights from London to San Francisco
from 421 US$
From 558 USD — compare hundreds of airlines
The cheapest month is usually 2026-09 · 421 US$
See prices for my dates →Live fares from 100+ sites — free, with no hidden fees.
About this route
Compare flights from London to San Francisco, a about 8,625 km route (around 11h 17m 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 London to San Francisco?
It's usually 2026-09, from 421 USD. Use the price calendar to compare other dates.
How long is the flight from London to San Francisco?
A nonstop flight takes about 11h 17m and covers around 8,625 km. Connecting itineraries take longer.
Are there direct flights from London to San Francisco?
Yes, this route has nonstop flights. Filter by "nonstop" to see them.
Which airlines fly from London to San Francisco?
American Airlines, British Airways, Iberia, Lufthansa operate this route, among others. Compare them all in the results.
When should I book London–San Francisco 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.
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