Search for cheap flights and last-minute deals with Netflights. We've scanned all the flights from London Heathrow to San Francisco, across the 18 airlines that offer this route. We've found that 12 / Jan / 2022 is the cheapest date to travel at the moment, but it's best to go through the results to see which flight suits you.
There are 3,391 flights from London Heathrow to or via San Francisco every week. Out of the 18 available airlines, the most popular ones are Air Canada, British Airways & Finnair. But that doesn’t necessarily mean they’ll be the best option for your travel dates. To see as many flights as possible, try widening your search to include other departure airports.
Your flight from London Heathrow to San Francisco will take at least 10 hrs 50 mins. On average, it takes 15 hrs 20 mins to fly the 8622 km distance. Take a look at flight times to see which one works best for you.
January is normally the cheapest month to fly to San Francisco, but it’s important to try different options when you search. Searching by month, for instance, will show you the best time of the week to fly. August is always the most expensive time to fly but, if you check regularly and book early, you have a better chance of getting a good deal.