Cheap flights from London to San Diego from $546

If you are unable to visit San Diego during the month of January, then departing from London during the month February is also very affordable. Most momondo users find prices during this month for around $754.

The cheapest day to depart from London to San Diego is on a Wednesday. Travelers who choose to depart for San Diego on a Wednesday will often find tickets for as low as $897. If your travel schedule is flexible, try to avoid departing on a Tuesday because tickets tend to average around $1,511. 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 in the morning when flights can be purchased for as low as $1,037. Flights at noon are often more expensive with an average ticket price of $1,490.

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

You are more likely to see cheaper flights to San Diego from London when booking weeks ahead of your departure date. In general, you can expect to find flights to San Diego for around $994 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Diego from London for as low as $894 on momondo.

There are 3 cabin classes available to choose from on London to San Diego 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 London to San Diego.

As of October 2026, prices for London to San Diego flights are approximately 34% cheaper when compared to flights at the same time last year.

Historically, on average around 16% of flights between London and San Diego have experienced a delay on any given week. The average delay length over the past 12 months has been 142 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. Saturday 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 16% of their flights experiencing any sort of delay.

Chicago (ORD) was the most common stop: 67% of momondo users choosing 1-stop flights on this route connected there.

Flights via Seattle (SEA) offer the lowest average round-trip price of $834.

Flights connecting via Seattle (SEA) have the shortest average one-way travel time: 14h 59m.

Chicago (ORD) has the shortest average layover time for this route: 1h 36m.

The number of flights available between London and San Diego is 8 per day as of October 2026. The most frequent departure time is 2:00PM, with 50% of daily flights leaving in the afternoon.

As of October 2026, 60 flights take off from London and land in San Diego each week. The most common flight departure day for this route is Mon, with 18% of weekly flights taking off on this day.