Search for cheap flights and last-minute deals with Netflights. We've scanned all the flights from London Heathrow to San Diego, across the ten airlines that offer this route. We've found that 25 / Sep / 2025 is the cheapest date to travel at the moment, but it's best to go through the results to see which flight suits you.
The most popular airlines offering flights to San Diego are Aer Lingus, British Airways & Lufthansa. Aer Lingus is the most popular one, but that doesn’t mean their flights will be the cheapest. If you can't find a flight time that suits you, why not look at flying out from a different airport?
The distance between London Heathrow to San Diego is 8814 km. Normally, it takes about 14 hrs to fly, and you can definitely expect the journey to be at least 11 hrs 5 mins. You can see the various flight times in the results.
January is normally the cheapest month to fly to San Diego, but it’s important to try different options when you search. Searching by month, for instance, will show you the best time of the week to fly. July is always the most expensive time to fly but, if you check regularly and book early, you have a better chance of getting a good deal.
