Cheap flights from San Diego to London from $305

The month of October is, on average, the cheapest month to fly to London Heathrow Airport from San Diego, with most prices found around $714. If you’re not able to fly to London Heathrow Airport in October, then November is your next best option. Flight prices from San Diego to London Heathrow Airport during November average around $726.

Our data shows that Monday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $838. The most expensive day to fly to London Heathrow Airport is Thursday, with ticket prices averaging around $927.

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the afternoon. momondo users have found flights departing from San Diego to London Heathrow Airport in the afternoon for as low as $857. 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 $913.

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

You are more likely to see cheaper flights to London Heathrow Airport from San Diego when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $899 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 San Diego for as low as $731 on momondo.

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

No. A direct flight is the cheapest option for a flight between San Diego to London Heathrow Airport.

As of February 2026, prices for San Diego to London Heathrow Airport flights are approximately 9% more expensive when compared to flights at the same time last year.

United Airlines and Delta are the most popular carriers operating from San Diego to London Heathrow

British Airways, American Airlines and United Airlines are the top three most popular airlines that fly to London Heathrow Airport from San Diego according to our data. British Airways is the first choice among our users, with 59% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 10 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

The number of flights available between San Diego and London Heathrow Airport is 3 per day as of February 2026. The most frequent departure time is 6:00PM, with 100% of daily flights leaving in the evening.

As of February 2026, 27 flights take off from San Diego and land in London Heathrow Airport each week. The most common flight departure day for this route is Mon, with 22% of weekly flights taking off on this day.