$65 Cheap Flights from Istanbul (IST) to Sofia (SOF)

View $65 flight on Sun, Aug 24, 2025Opens in a new window

Popular airlines from Istanbul Airport (IST) to Sofia Airport (SOF)

Cheap Flights from Istanbul to Sofia (IST-SOF)

Prices were available within the past 7 days and start at $65 for one-way flights and $139 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Pegasus Airlines
Wed, Sep 3 - Sat, Sep 6
SAW
Istanbul
SOF
Sofia
$139 Roundtrip, found 5 hours ago
$139
Roundtrip
found 5 hours ago
Select Pegasus Airlines flight, departing Wed, Sep 3 from Istanbul to Sofia, returning Sat, Sep 6, priced at $139 found 5 hours ago
Pegasus Airlines
Thu, Jul 17 - Mon, Jul 21
SAW
Istanbul
SOF
Sofia
$140 Roundtrip, found 10 hours ago
$140
Roundtrip
found 10 hours ago
Select Pegasus Airlines flight, departing Thu, Jul 17 from Istanbul to Sofia, returning Mon, Jul 21, priced at $140 found 10 hours ago
Pegasus Airlines
Wed, Sep 17 - Mon, Sep 29
SAW
Istanbul
SOF
Sofia
$141 Roundtrip, found 14 hours ago
$141
Roundtrip
found 14 hours ago
Select Pegasus Airlines flight, departing Wed, Sep 17 from Istanbul to Sofia, returning Mon, Sep 29, priced at $141 found 14 hours ago
Pegasus Airlines
Fri, Aug 15 - Tue, Aug 26
SAW
Istanbul
SOF
Sofia
$142 Roundtrip, found 3 hours ago
$142
Roundtrip
found 3 hours ago
Select Pegasus Airlines flight, departing Fri, Aug 15 from Istanbul to Sofia, returning Tue, Aug 26, priced at $142 found 3 hours ago
Pegasus Airlines
Mon, Jul 21 - Fri, Jul 25
SAW
Istanbul
SOF
Sofia
$143 Roundtrip, found 1 day ago
$143
Roundtrip
found 1 day ago
Select Pegasus Airlines flight, departing Mon, Jul 21 from Istanbul to Sofia, returning Fri, Jul 25, priced at $143 found 1 day ago
Pegasus Airlines
Thu, Jul 17 - Sun, Jul 20
SAW
Istanbul
SOF
Sofia
$145 Roundtrip, found 1 day ago
$145
Roundtrip
found 1 day ago
Select Pegasus Airlines flight, departing Thu, Jul 17 from Istanbul to Sofia, returning Sun, Jul 20, priced at $145 found 1 day ago
Turkish Airlines
Thu, Aug 7 - Wed, Aug 20
IST
Istanbul
SOF
Sofia
$146 Roundtrip, found 2 days ago
$146
Roundtrip
found 2 days ago
Select Turkish Airlines flight, departing Thu, Aug 7 from Istanbul to Sofia, returning Wed, Aug 20, priced at $146 found 2 days ago
SKY express
Sun, Feb 1 - Fri, Feb 13
IST
Istanbul
SOF
Sofia
$197 Roundtrip, found 5 days ago
$197
Roundtrip
found 5 days ago
Select SKY express flight, departing Sun, Feb 1 from Istanbul to Sofia, returning Fri, Feb 13, priced at $197 found 5 days ago
Air Serbia
Mon, Nov 24 - Fri, Nov 28
IST
Istanbul
SOF
Sofia
$223 Roundtrip, found 3 days ago
$223
Roundtrip
found 3 days ago
Select Air Serbia flight, departing Mon, Nov 24 from Istanbul to Sofia, returning Fri, Nov 28, priced at $223 found 3 days ago
Aegean
Fri, Dec 26 - Tue, Dec 30
IST
Istanbul
SOF
Sofia
$226 Roundtrip, found 21 hours ago
$226
Roundtrip
found 21 hours ago
Select Aegean flight, departing Fri, Dec 26 from Istanbul to Sofia, returning Tue, Dec 30, priced at $226 found 21 hours ago

Find the cheapest month to fly from Istanbul (IST) to Sofia (SOF)

January is typically the cheapest month to fly

From $89 - $273 per traveler.

Graph displaying average flight prices per month

Flights from Istanbul (SAW) to Sofia (SOF)
Origin airport
Sabiha Gokcen Intl.
Destination airport
Sofia
Airlines serving
Aegean, Air Serbia, ITA Airways, LOT-Polish Airlines, Tarom-Romanian Air Transport, Turkish Airlines
Roundtrip price
$139
Distance
328 mi
Average flight time
1 hour 21 mins

Istanbul to Sofia Flights

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

 

The best time to book a flight from Istanbul to Sofia

Sunday is one of the best days to book for cheap flights from Istanbul 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 Istanbul 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 Istanbul to Sofia in 2025. You can also book with separate airlines for your outbound and return journeys, from $65 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 Istanbul 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 Istanbul 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 Istanbul (IST) to Sofia Airport (SOF) cost?
Find cheap return fares from Istanbul (IST) to Sofia Airport (SOF) starting at $155. Reserve your seat and be on your way. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Turkish Airlines flight leaving IST on August 7 2025 and touching down at SOF. The price was last updated on July 11 2025 and has not changed since.
What is the cheapest month to fly from IST to SOF?
The cheapest flights from IST 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 Istanbul (IST) to Sofia Airport (SOF)?
Direct flights aren't available from Istanbul (IST) to Sofia Airport (SOF). However, you'll find other airports with nonstop flights. Start your journey at Ataturk Intl. Airport (IST) and fly straight to Sofia without layovers.
What is the cheapest airline that flies from IST to SOF?
At the moment, the cheapest carrier offering one-way flights from IST to SOF is Turkish Airlines. You can take off on this route from $92. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from IST on October 1 2025. Prices were last updated on July 11 2025 and have not changed since.
How many flights per day from Istanbul (IST) to Sofia Airport (SOF)?
There aren't any daily direct flights departing from Istanbul (IST) to Sofia Airport (SOF). But you can book flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be on your way in no time.
What day of the week has the most flights from IST to SOF?
You'll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Istanbul (IST) to Sofia Airport (SOF)?
To avoid possible delays on the Istanbul (IST) to Sofia Airport (SOF) route, travel before 3 PM. Later departures have a 22% higher chance of being canceled.**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 Istanbul (IST) to Sofia Airport (SOF) last-minute?
Booking your ticket from IST to SOF shortly before your journey is generally more expensive. But if there's some wiggle room with your travel dates and times, you could grab a cheap last-minute fare.
Is it cheaper to book an IST to SOF flight and hotel package?
Compared with arranging hotels and flights separately, booking an IST to SOF flight and hotel package with Expedia could lead to significant savings. Better yet, having it all in one place will take the stress out of planning your trip. Just secure your flights and choose from our wide range of stays, then personalize your trip with extras like car rentals and activities.
Can I cancel or change the date of my flight from Istanbul (IST) to Sofia Airport (SOF)?
It's usually possible to reschedule or cancel your IST to SOF flight. However, for bookings made more than 24 hours ago, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.