Cheap flights from London Heathrow Airport to California from £346

If you are unable to visit California during the month of February, then departing from London Heathrow Airport during the month September is also very affordable. Most momondo users find prices during this month for around £482.

The cheapest day to depart on your flight to California is on a Thursday when prices can be found for as low as £518. This is often the case because there is less demand to fly during this day of the week. On the other hand, Sunday is the most expensive day to depart from London Heathrow Airport because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £580.

The cheapest time of day to fly to California is in the morning when flights can be purchased for as low as £520. In contrast, the most expensive time of day to depart to California is in the afternoon when prices are around £559.

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

You are more likely to see cheaper flights to California from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to California for around £504 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to California from London Heathrow Airport for as low as £463 on momondo.

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

Alaska Airlines, United Airlines, and SWISS are the most popular carriers operating from London Heathrow to California

Virgin Atlantic, British Airways and Lufthansa are the top three most popular airlines that fly to California from London Heathrow Airport according to our data. Virgin Atlantic is the first choice among our users, with 40% of people opting to fly with this airline when travelling to California. Keep in mind that there are 19 different airlines that fly to California on a routine basis, so you have a few additional options to choose from.

As of September 2026, there are 113 flights per day flying from London Heathrow Airport to California. The most common time of day flights depart is 10:00, with 53% of flights taking off in the afternoon.

As of September 2026, 793 flights take off from London Heathrow Airport and land in California each week. The most common flight departure day for this route is Wed, with 15% of weekly flights taking off on this day.