$308 Cheap Flights from Southampton (SOU) to Sofia (SOF)

View $308 flight on Fri, May 30, 2025Opens in a new window

Popular airlines from Southampton (SOU) to Sofia Airport (SOF)

  • Plan, book, fly with confidence

  • trending down icon
    Be in the know
    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon
    Book smarter
    Save up to 30% on select hotels after you book a flight*
  • one key icon
    Earn twice
    Earn your airline miles on top of our OneKeyCash
    Learn about One Key
Find available prices by choosing your travel dates.

Cheap Flights from Southampton to Sofia (SOU-SOF)

Prices were available within the past 7 days and start at $308 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 Sofia (SOF)
Origin airport
Southampton
Destination airport
Sofia
Distance
1294 mi

Southampton to Sofia Flights

The cheapest times to fly from Southampton to Sofia

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 Sofia are during the month of . You can find some of the cheapest flights from Southampton to Sofia with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Southampton to Sofia

Sunday is one of the best days to book for cheap flights from Southampton to Sofia: 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 Sofia

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 Sofia in 2025. You can also book with separate airlines for your outbound and return journeys, from $308 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 Sofia 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 Sofia 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 Sofia Airport (SOF) cost?
Discover the latest flight deals from SOU to SOF by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from SOU to SOF?
The cheapest flights from SOU to SOF are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Southampton Airport (SOU) to Sofia Airport (SOF)?
While Southampton (SOU) has no direct flights to Sofia Airport (SOF), other airports have nonstop options. Flying from Heathrow Airport (LHR) will get you to Sofia without any detours.
What is the cheapest airline that flies from SOU to SOF?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from SOU to SOF. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Southampton Airport (SOU) to Sofia Airport (SOF)?
There aren’t any daily nonstop flights from Southampton Airport (SOU) to Sofia Airport (SOF). But you can choose flights with layovers. Filter your search results on Expedia to include one or more stops, and you’ll be soaring above the clouds in no time at all.
What day of the week has the most flights from SOU to SOF?
Usually you’ll find the most flight options available on a Friday. Tuesdays are often the quietest.* But 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 Sofia Airport (SOF)?
Select a flight from Southampton Airport (SOU) to Sofia Airport (SOF) that leaves before 3 PM to reduce the risk of cancellations. Departures after this hour have a 22% higher chance of being canceled, on average.**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 Sofia Airport (SOF) last-minute?
Last-minute bookings from SOU to SOF are typically more expensive. To lock in the best prices, start looking for flights well in advance. That being said, if your travel plans are flexible, it’s possible to score a cheap fare right before your trip.
Is it cheaper to book a SOU to SOF flight and hotel package?
You’ll typically save money by securing a SOU to SOF flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it’s easy to manage it all in one convenient place. Once you’ve chosen your preferred flights and accommodations, consider adding extras such as tours, car rentals and activities.
Can I cancel or change the date of my flight from Southampton Airport (SOU) to Sofia Airport (SOF)?
If you reserved your SOU to SOF flight in the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the type of ticket you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for more information.

Explore a world of travel with Expedia

*Available to One Key members.