Cheap flights from San Diego to London from $291

The month of November is, on average, the cheapest month to fly to London Heathrow Airport from San Diego, with most prices found around $770. If you’re not able to fly to London Heathrow Airport in November, then February is your next best option. Flight prices from San Diego to London Heathrow Airport during February average around $792.

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 $911. The most expensive day to fly to London Heathrow Airport is Monday, with ticket prices averaging around $1,012.

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 $951. 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 $1,007.

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 $1,031 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 $891 on momondo.

There are 4 cabin classes available to choose from on San Diego 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.

You could potentially save up to 20% on your flight if you consider stops on a San Diego to London Heathrow Airport flight.

As of August 2026, prices for San Diego to London Heathrow Airport flights are approximately 25% cheaper when compared to flights at the same time last year.

JetBlue, British Airways, and United Airlines 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 56% 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.

New York (JFK) was the most common stop: 75% of momondo users choosing 1-stop flights on this route connected there.

Flights via New York (JFK) offer the lowest average round-trip price of $750.

Flights connecting via Munich (MUC) have the shortest average one-way travel time: 14h 25m.

Munich (MUC) has the shortest average layover time for this route: 1h 45m.

The number of flights available between San Diego and London Heathrow Airport is 9 per day as of August 2026. The most frequent departure time is 7:00PM, with 66% of daily flights leaving in the evening.

As of August 2026, 63 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 14% of weekly flights taking off on this day.