Cheap flights from the United Kingdom to San Diego from $427

If you are unable to visit San Diego during the month of February, then departing from United Kingdom during the month January is also very affordable. Most momondo users find prices during this month for around $496.

The cheapest day to depart from United Kingdom to San Diego is on a Tuesday. Travelers who choose to depart for San Diego on a Tuesday will often find tickets for as low as $774. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $1,143. These prices are subject to change though, so be sure to set up a Price Alert for flights to San Diego.

The cheapest time of day to fly to San Diego is at noon when flights can be purchased for as low as $842. Flights in the morning are often more expensive with an average ticket price of $919.

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

You are more likely to see cheaper flights to San Diego from United Kingdom when booking weeks ahead of your departure date. In general, you can expect to find flights to San Diego for around $859 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Diego from United Kingdom for as low as $727 on momondo.

United Airlines, Delta, and Lufthansa are the most popular carriers operating from United Kingdom to San Diego

British Airways, American Airlines and United Airlines are the top three most popular airlines that fly to San Diego from United Kingdom according to our data. British Airways is the first choice among our users, with 53% of people opting to fly with this airline when traveling to San Diego. Keep in mind that there are 4 different airlines that fly to San Diego on a routine basis, so you have a few additional options to choose from.

Historically, on average around 17% of flights between United Kingdom and San Diego have experienced a delay on any given week. The average delay length over the past 12 months has been 149 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights in the early afternoon have, in the past, seen delays more frequently in comparison.

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

According to our data, British Airways have had the least number of delays on this route over the last 12 months; with about 17% of their flights experiencing any sort of delay.

As of May 2026, 9 flights take off from United Kingdom and land in San Diego each day. The most common flight departure time for this route is 2:00PM, with 63% of daily flights taking off in the afternoon.

As of May 2026, 63 flights take off from United Kingdom and land in San Diego each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.