Cheap flights from Los Angeles to London from $338

The month of September is, on average, the cheapest month to fly to London Heathrow Airport from Los Angeles, with most prices found around $646. If you’re not able to fly to London Heathrow Airport in September, then October is your next best option. Flight prices from Los Angeles to London Heathrow Airport during October average around $650.

Our data shows that Wednesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $754. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $854.

According to our data, the cheapest time of day to fly to London Heathrow Airport is at noon. momondo users have found flights departing from Los Angeles to London Heathrow Airport at noon for as low as $752. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the evening are often more expensive with an average ticket price of $805.

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

You are more likely to see cheaper flights to London Heathrow Airport from Los Angeles when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $761 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Los Angeles for as low as $705 on momondo.

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

You could potentially save up to 7% on your flight if you consider stops on a Los Angeles to London Heathrow Airport flight.

As of February 2026, prices for Los Angeles to London Heathrow Airport flights are approximately 14% cheaper when compared to flights at the same time last year.

SWISS, Lufthansa, and Scandinavian Airlines are the most popular carriers operating from Los Angeles to London Heathrow

British Airways, Virgin Atlantic and United Airlines are the top three most popular airlines that fly to London Heathrow Airport from Los Angeles according to our data. British Airways is the first choice among our users, with 49% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 20 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

Historically, on average around 10% of flights between Los Angeles and London have experienced a delay on any given week. The average delay length over the past 12 months has been 162 minutes.

Generally, flights departing in the evening tend to experience fewer delays. Flights at night have, in the past, seen delays more frequently in comparison.

Thursday is statistically the day of the week which experiences the fewest number of delays on this flight route. Wednesday has historically seen more delays on average compared to the rest of the week.

According to our data, Virgin Atlantic have had the least number of delays on this route over the last 12 months; with about 7% of their flights experiencing any sort of delay.

Copenhagen (CPH) was the most common stop: 31% of momondo users choosing 1-stop flights on this route connected there.

Flights via Denver (DEN) offer the lowest average round-trip price of $619.

Flights connecting via Denver (DEN) have the shortest average one-way travel time: 12h 07m.

Denver (DEN) has the shortest average layover time for this route: 1h 15m.

As of February 2026, there are 48 flights per day flying from Los Angeles to London Heathrow Airport. The most common time of day flights depart is 7:00PM, with 74% of flights taking off in the evening.

The number of flights available between Los Angeles and London Heathrow Airport is 339 per week as of February 2026. The most frequent departure day is Mon, with 15% of weekly flights leaving on this day.