Cheap flights from San Francisco Bay Area to London from £170

The cheapest month to fly to London from San Francisco Bay Area is in January. Flight prices, which tend to average around £471, are often lower during this time because this is during the off-season. The month of February is another great option to travel to London, with average flight prices from San Francisco Bay Area averaging around £481.

Our data shows that Wednesday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £489. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from San Francisco Bay Area to London for around £635.

The cheapest time of day to fly to London is in the morning when flights can be purchased for as low as £534. Flights at midday are often more expensive, with an average ticket price of £785.

Fly from San Francisco to London Heathrow for the best San Francisco Bay Area - London flight prices

You are more likely to see cheaper flights to London from San Francisco Bay Area when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £558 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from San Francisco Bay Area for as low as £532 on momondo.

There are 4 cabin classes available to choose from on San Francisco Bay Area to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Iberia, KLM, and Delta are the most popular carriers operating from San Francisco Bay Area to London

Virgin Atlantic, United Airlines and British Airways are the top three most popular airlines that fly to London from San Francisco Bay Area according to our data. Virgin Atlantic is the first choice among our users, with 36% of people opting to fly with this airline when travelling to London. Keep in mind that there are 6 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

As of February 2026, there are 31 flights per day flying from San Francisco Bay Area to London. The most common time of day flights depart is 17:00, with 81% of flights taking off in the afternoon.

As of February 2026, 217 flights take off from San Francisco Bay Area and land in London each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.