Cheap flights from California to London from £121

In general, February is the cheapest month to fly from California to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £501. The month of January is another great option to travel to London Heathrow Airport, with average flight prices from California averaging around £563.

On average, the least expensive day to fly to London Heathrow Airport from California is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as £707. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Thursday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Thursday is £870.

According to our data, the cheapest time of day to fly to London Heathrow Airport is at midday. momondo users have found flights departing from California to London Heathrow Airport at midday for as low as £512. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are £799 on average. Flights to London Heathrow Airport from California in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

Fly from Los Angeles Los Angeles to London Heathrow for the best California - London Heathrow flight prices

You are more likely to see cheaper flights to London Heathrow Airport from California when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £705 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from California for as low as £645 on momondo.

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

JetBlue, Delta, and Alaska Airlines are the most popular carriers operating from California to London Heathrow

Virgin Atlantic, British Airways and United Airlines are the top three most popular airlines that fly to London Heathrow Airport from California according to our data. Virgin Atlantic is the first choice among our users, with 43% of people opting to fly with this airline when travelling to London Heathrow Airport. Keep in mind that there are 11 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

104 flights are operational daily from California to London Heathrow Airport as of September 2026. The most popular departure time for this route is 16:00, with 57% of flights per day taking off in the afternoon.

As of September 2026, there are 728 flights per week flying from California to London Heathrow Airport. The most common day of the week flights depart is Wed, with 16% of flights taking off on this day.