San Francisco to London is an overnight transatlantic. Nonstops to Heathrow are usually about 10 to 11 hours eastbound. Westbound returns can run 11 hours or more against the wind. One-stops via the East Coast or Dublin are a full extra beat.
Why overnight
Evening departures from SFO land in the morning in London, which is the usual pattern for this city pair. A daytime departure is rarer and still a long sitting.
Cabin
Premium economy or business is worth pricing on this length. Search both cabins; a sale business fare sometimes sits close to a flexible economy ticket.
Frequently asked questions
- How long is the nonstop?
- Typically about 10–11 hours SFO–LHR eastbound. Confirm on the live offer.
- How do I compare fares on FaresMatch?
- Enter airports and dates in the search on this page. Each offer lists baggage, change and refund rules before checkout.
- Is FaresMatch the airline?
- No. We are an independent flight comparison platform. After you book, you still receive an airline confirmation you can use to manage the trip.
