Flights
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Sign up for Crystal Travel emails below to reveal a promo code you can use today.Planning a trip from London Heathrow to San Diego? Whether you're heading for a sunny California holiday, a work trip, or visiting family across the pond, finding the right flight from London to San Diego is easier than ever. With plenty of travel options, competitive prices, and top-tier airlines offering excellent service, flying from London Heathrow to San Diego guarantees a smooth start to your journey.
Travelling direct from London Heathrow to San Diego is both convenient and efficient, especially with British Airways offering non-stop services on this route. These direct flights save you the hassle of multiple layovers, with an average flight time from London to San Diego of around 11 hours. This long-haul route connects two vibrant cities and lands you right in the heart of Southern California — a region known for its scenic coastlines, sunny weather, and laid-back vibe. Departing from Heathrow, one of the UK’s busiest and most well-connected airports, and landing at San Diego International Airport means you can travel stress-free and enjoy the best of both worlds.
If you're looking for cheap flights from London to San Diego, there are plenty of ways to find excellent deals without compromising on comfort. Booking in advance, flying midweek, and staying flexible with your travel dates can significantly lower your fare. Using fare alerts or travel comparison sites can also help you stay ahead of price drops. The cheapest flights from London Heathrow to San Diego are often found outside of peak travel times, so consider travelling in spring or autumn when prices tend to dip. These affordable flight options make it easier to plan your California escape, whether it's a quick city break or an extended beach holiday.
Several well-known airlines operate on the London to San Diego route, including British Airways, American Airlines, Delta Air Lines, and United Airlines. While British Airways provides direct flights, other airlines offer one-stop journeys with connections through major US hubs. These airlines offer a variety of cabin classes, from economy to premium and business, with comfortable seating, in-flight entertainment, and meal options to make your transatlantic journey as relaxing as possible. Choosing the right airline for your flight from London Heathrow to San Diego depends on your schedule, budget, and preferences.
The flight distance from London to San Diego is approximately 5,500 miles, with the average non-stop flight time hovering around 11 hours. San Diego is 8 hours behind London, so adjusting your body clock during the flight is a good idea if you want to make the most of your first day upon arrival. Once you land at San Diego International Airport, the city centre is just a short ride away, allowing you to start your trip without delay.
When it comes to securing the best deals, timing matters. The best time to book London to San Diego flights is typically during the shoulder seasons — spring (March to May) and autumn (September to November). These months not only bring pleasant weather and fewer tourists, but they also offer some of the lowest airfares. Booking two to three months in advance increases your chances of snagging cheap flights to San Diego, and midweek departures often come at a lower cost compared to weekends and public holidays. For those seeking last-minute flights, keeping an eye on daily fare fluctuations can sometimes lead to surprise savings.
San Diego is a fantastic destination for travellers from the UK. With its year-round sunshine, stunning beaches, and a laid-back atmosphere, it appeals to both holidaymakers and business travellers. Popular spots like La Jolla, Coronado Beach, and the historic Gaslamp Quarter offer something for everyone. The city is also home to world-famous attractions such as the San Diego Zoo and Balboa Park, along with a vibrant food and craft beer scene that continues to attract visitors from around the globe. Flying from London to San Diego opens the door to adventure, culture, and relaxation — all wrapped up in California charm.
Round‑trip fares usually range from £450 to £1,000, influenced by season, lead time, and cabin class
May and September often offer the lowest fares, as these shoulder seasons balance favourable weather with reduced demand
Booking around 40 days before departure typically secures the most competitive prices on LHR–SAN flights
Yes, British Airways operates daily non‑stop services between LHR and SAN
Non‑stop flights average approximately 11 hours 15 minutes in duration
British Airways offers non‑stop flights; American Airlines and United Airlines provide one‑stop options via U.S. hubs
Use flexible‑date searches, mid‑week travel filters, and fare alerts to uncover the lowest fares
Explore our interlinking widget for car hire, hotels, and onward travel options throughout California—plus curated destination guides to enrich your San Diego adventure.
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