$1,053 Cheap Flights from Southampton (SOU) to San Diego (SAN)

View $1,053 flight on Thu, Oct 9, 2025Opens in a new window

Popular airlines from Southampton (SOU) to San Diego Intl. Airport (SAN)

Cheap Flights from Southampton to San Diego (SOU-SAN)

Prices were available within the past 7 days and start at $1,053 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Flights from Southampton (SOU) to San Diego (SAN)
Origin airport
Southampton
Destination airport
San Diego Intl.
Distance
5465 mi

Southampton to San Diego Flights

The cheapest times to fly from Southampton to San Diego

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Southampton to San Diego are during the month of . You can find some of the cheapest flights from Southampton to San Diego with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Southampton to San Diego

Sunday is one of the best days to book for cheap flights from Southampton to San Diego: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Southampton to San Diego

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Southampton to San Diego in 2025. You can also book with separate airlines for your outbound and return journeys, from $1,053 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Southampton to San Diego flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Southampton to San Diego airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Southampton Airport (SOU) to San Diego Intl. Airport (SAN) cost?
Lock in a cheap one-way flight from $1,053 or cheap return flight from Southampton Airport (SOU) to San Diego Intl. Airport (SAN) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Southampton Airport (SOU) to San Diego Intl. Airport (SAN)?
Planning your trip for is a great way to save, as it's the cheapest month for flights between SOU and SAN. You'll typically find the lowest prices during off-peak months.
Which airlines fly direct from Southampton Airport (SOU) to San Diego Intl. Airport (SAN)?
While Southampton (SOU) has no direct flights to San Diego Intl. Airport (SAN), other airports have nonstop routes. Traveling from Heathrow Airport (LHR) will get you to San Diego without any layovers.
What is the cheapest airline that flies from Southampton Airport (SOU) to San Diego Intl. Airport (SAN)?
To find the cheapest airline that'll fly you from SOU to SAN, use Expedia's filter tool. Customize your search based on your travel needs, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Southampton Airport (SOU) to San Diego Intl. Airport (SAN)?
You'll have to hop on a flight with a layover if you're traveling from Southampton Airport (SOU) to San Diego Intl. Airport (SAN). Direct flights don't operate daily on this route. However, simply filter your search to include one or two stops to discover an option that works for you.
What day of the week has the most flights from SOU to SAN?
Typically you'll find the widest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* However, this can change depending on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Southampton Airport (SOU) to San Diego Intl. Airport (SAN)?
To touch down at San Diego Intl. Airport (SAN) on time, opt for a flight that leaves from Southampton Airport (SOU) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Southampton Airport (SOU) to San Diego Intl. Airport (SAN) last-minute?
Holding off until just before your trip to book a ticket from SOU to SAN often results in higher prices. While you might find some last-minute discounts, they aren't always guaranteed. Be flexible with your travel plans to maximize your chances of scoring a bargain.
Is it cheaper to book a SOU to SAN flight and hotel package?
Compared with arranging hotels and flights separately, booking a SOU to SAN flight and hotel package with Expedia could result in significant savings. What's more, having everything in one easy place will take the stress out of planning your trip. Just secure your flights and choose from our extensive range of stays, then customize your trip with other add-ons like activities, tours and car rentals.
Can I cancel or change the date of my flight from Southampton Airport (SOU) to San Diego Intl. Airport (SAN)?
If you booked your SOU to SAN flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for further details.

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*Available to One Key members.