€347 Cheap Flights London to San Francisco (LHR-SFO)

Within the past 7 days on Expedia, for flights departing within the next year, the lowest price available for a round-trip flight between LHR and San Francisco Intl. Airport (SFO) was €502. Great fares don’t last long, so make sure you book yours today. Prices and availability are subject to change. Additional terms apply.

Most flights can be cancelled online, but each airline has its own set of terms and conditions. If you do have to cancel your flight, go to our Customer Service Portal and follow the instructions.

Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you’re searching for London Heathrow to San Francisco Airport flights, you’ll see a “no change fees” filter for you to select.

With around 8,600 kilometres separating Heathrow Airport (LHR) and SFO, your flight will be a long one. Pack wisely to make your journey comfortable. Simple things like warm clothing and some noise-cancelling headphones can make a huge difference.

United Airlines (UA) is one of the preferred choices for travellers jetting between LHR and San Francisco Intl. Airport (SFO). Take your pick of the 60 flights it operates on this route each month. You could also check out the fares on offer with British Airways (BA). This carrier operates 60 flights a month between Hounslow and San Francisco.

Flight prices from Heathrow Airport to San Francisco Airport are available up to 12 months prior to departure on Expedia. And although you may pick up a fantastic last-minute deal, it’s not something you should bank on. Also, booking your flights ahead of time means you’ll have more choices — and you can avoid being wedged in the dreaded middle seat! We’re always updating our fares to make sure you get the biggest bargains, so check back often for all the latest specials.