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 17 / Jan / 2025 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 4,197 flights from London Heathrow to or via San Francisco every week. Out of the 18 available airlines, the most popular ones are Lufthansa, British Airways & Air Canada. 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 11 hrs 5 mins. On average, it takes 13 hrs 25 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.
