SOF - IST

£68 Find Cheap Flights from Sofia to Istanbul

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Sofia to Istanbul departing on 20/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Istanbul Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Sofia to Istanbul, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Sofia to Istanbul, as well as popular online travel agencies
Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest return fare
£138
Typical prices: £119-£74
Air Serbia
Tue 29/9Wed 30/9
SOF - IST • 1 stop
Cheapest direct flights
£167
Typical prices: £135-£76
Turkish Airlines
Mon 22/6Mon 29/6
SOF - IST • Direct
Top airlines
Cheapest • from £138 (return)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Direct flights
You can fly direct with Turkish Airlines. Average duration is 1h 30m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Avoid delays
Most punctual • 90% on-time
Best time • Fewest delays
Insights
Insights
Insights
Insights
When to travel
Cheapest • 19% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Istanbul!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Sofia to Istanbul (SOF-IST)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Sofia to Istanbul that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Sofia to Istanbul

Tue, 29 Sep - Wed, 30 Sep
Air Serbia Logo
16:00 - 03:40
SOF
-
IST
11h 40m
1 stop
Air Serbia Logo
15:45 - 15:30
IST
-
SOF
23h 45m
1 stop
£138Air Serbia
Sat, 26 Sep - Wed, 30 Sep
Air Serbia Logo
16:00 - 15:00
SOF
-
IST
23h 00m
1 stop
Air Serbia Logo
04:30 - 15:30
IST
-
SOF
11h 00m
1 stop
£139Air Serbia
Mon, 8 Jun - Wed, 24 Jun
Multiple Airlines Logo
16:00 - 03:40
SOF
-
IST
11h 40m
1 stop
Multiple Airlines Logo
13:45 - 15:00
IST
-
SOF
1h 15mdirect
£153Multiple Airlines
Mon, 8 Jun - Wed, 24 Jun
Multiple Airlines Logo
16:00 - 03:40
SOF
-
IST
11h 40m
1 stop
Multiple Airlines Logo
13:45 - 15:00
IST
-
SOF
1h 15mdirect
£154Multiple Airlines
Tue, 2 Jun - Fri, 12 Jun
Air Serbia Logo
16:00 - 03:40
SOF
-
IST
11h 40m
1 stop
Air Serbia Logo
04:30 - 15:30
IST
-
SOF
11h 00m
1 stop
£158Air Serbia
Mon, 8 Jun - Wed, 24 Jun
Multiple Airlines Logo
18:55 - 08:45
SOF
-
IST
13h 50m
2 stops
Multiple Airlines Logo
13:45 - 15:00
IST
-
SOF
1h 15mdirect
£162Multiple Airlines
Mon, 8 Jun - Wed, 24 Jun
Multiple Airlines Logo
18:55 - 08:45
SOF
-
IST
13h 50m
2 stops
Multiple Airlines Logo
13:45 - 15:00
IST
-
SOF
1h 15mdirect
£163Multiple Airlines
Mon, 22 Jun - Mon, 29 Jun
Turkish Airlines Logo
21:05 - 22:35
SOF
-
IST
1h 30mdirect
Turkish Airlines Logo
13:45 - 15:00
IST
-
SOF
1h 15mdirect
£167Turkish Airlines
Mon, 8 Jun - Wed, 24 Jun
Turkish Airlines Logo
15:50 - 17:20
SOF
-
IST
1h 30mdirect
Turkish Airlines Logo
13:45 - 15:00
IST
-
SOF
1h 15mdirect
£167Turkish Airlines
Mon, 8 Jun - Wed, 24 Jun
Turkish Airlines Logo
15:50 - 17:20
SOF
-
IST
1h 30mdirect
Turkish Airlines Logo
13:45 - 15:00
IST
-
SOF
1h 15mdirect
£168Turkish Airlines
Booking Insights

KAYAK’s insights & trends for Sofia to Istanbul flights

Get data-powered insights and trends into flights from Sofia to Istanbul to help you find the cheapest flights, the best time to fly and much more.

How much is a return flight from Sofia to Istanbul Airport?

This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from Sofia to Istanbul Airport departing in September.

What is the cheapest month to fly from Sofia to Istanbul Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Sofia to Istanbul Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Sofia to Istanbul Airport is October, where tickets cost £84 (return) on average. On the other hand, the most expensive months are April and November, where the average cost of round-trip tickets is £114 and £109 respectively.

How far in advance should I book a flight from Sofia to Istanbul Airport?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Sofia to Istanbul Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Sofia to Istanbul Airport, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.

Good to know - Cheap tickets from Sofia to Istanbul

Low seasonNovember
Cheapest flight£68
Best time to beat the crowds but there is an average 6% increase in price.
Most popular time to fly and prices are also 18% lower on average.
Flight from Sofia to Istanbul

When to book flights from Sofia to Istanbul

Are your dates flexible? Find out the best times to travel from Sofia to Istanbul based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Sofia to Istanbul flights

  • What is the cheapest flight from Sofia to Istanbul Airport?

    In the last 3 days, the lowest price for a flight from Sofia to Istanbul Airport was £68 for a one-way ticket and £138 for a return.

  • Which airlines offer Wi-Fi service onboard planes from Sofia to Istanbul?

    Emirates, and flydubai offer inflight Wi-Fi service on the Sofia to Istanbul flight route.

  • Which aircraft models fly most regularly from Sofia to Istanbul?

    The Airbus A321 (sharklets) is the aircraft model that flies most regularly on the Sofia to Istanbul flight route.

  • Which airline alliances offer flights from Sofia to Istanbul?

    Star Alliance is the only airline alliance operating flights between Sofia and Istanbul.

  • On which days can I fly direct from Sofia to Istanbul?

    There are direct flights from Sofia to Istanbul on a daily basis.

  • Which is the best airline for flights from Sofia to Istanbul, Turkish Airlines or Pegasus Airlines?

    The two airlines most popular with KAYAK users for flights from Sofia to Istanbul are Turkish Airlines and Pegasus Airlines. With an average price for the route of £148 and an overall rating of 7.4, Turkish Airlines is the most popular choice. Pegasus Airlines is also a great choice for the route, with an average price of £85 and an overall rating of 6.7.

  • How does KAYAK find such low prices on flights from Sofia to Istanbul?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Sofia to Istanbul.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Sofia to Istanbul?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Istanbul from Sofia is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Sofia to Istanbul?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Istanbul with an airline and back to Sofia with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Sofia to Istanbul?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Istanbul from Sofia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Sofia to Istanbul Airport

  • Looking for a cheap flight from Istanbul to Sofia? 25% of our users found flights on this route for £183 or less one-way and £208 or less round-trip.

Prefer to fly direct from Sofia to Istanbul?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Sofia to Istanbul.
Find which airlines fly direct from Sofia Airport to Istanbul Airport, which days they fly and book direct flights.

Direct departures

Sofia to Istanbul

Monday

Turkish Airlines

Turkish Airlines

Tuesday

Turkish Airlines

Turkish Airlines

Wednesday

Turkish Airlines

Turkish Airlines

Thursday

Turkish Airlines

Turkish Airlines

Friday

Turkish Airlines

Turkish Airlines

Saturday

Turkish Airlines

Turkish Airlines

Sunday

Turkish Airlines

Turkish Airlines

See more direct flights

Direct returns

Istanbul to Sofia

Monday

Turkish Airlines

Turkish Airlines

Tuesday

Turkish Airlines

Turkish Airlines

Wednesday

Turkish Airlines

Turkish Airlines

Thursday

Turkish Airlines

Turkish Airlines

Friday

Turkish Airlines

Turkish Airlines

Saturday

Turkish Airlines

Turkish Airlines

Sunday

Turkish Airlines

Turkish Airlines

See more direct flights

Reviews of the top airlines flying from Sofia to Istanbul

 
See real verified KAYAK customer reviews for airlines flying from Sofia to Istanbul. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Sofia to Istanbul? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
Turkish AirlinesOverall score based on 4357 reviews
7.5Entertainment
7.3Comfort
7.3Boarding
7.8Crew
7.5Food
Airline reviews

Great staff/service on board. Check-in/boarding staff are very good, but overall supervision of their passenger intake processes needs attention.

10.0 ExcellentJim, May 2026
NAP - IST
Read more Turkish Airlines reviews

Great staff/service on board. Check-in/boarding staff are very good, but overall supervision of their passenger intake processes needs attention.

Food could of been a bit more premium, but everything was excellent. LOVED the innovative boarding drinks and terrific service!

The entire experience in Turkish business class was superb. From the friendly greetings including the chef, to the polite and classy service, all was wonderful. The in flight entertainment is one of the best. The food was the best I’ve had inflight.

Seats were very tight with poor legroom - and I am average height. During the 12 hour flight, tiny paper cups of drinks we're only offered during the super and breakfast services, with the crew nowhere to be seen in between. One of the bathrooms was out of order, leading to long lines waiting to use the remaining two available to the economy class passengers.

short flight but we still got a very nice lunch and the crew did an excellent job in taking care of us

For that price on Business class, I expected to have the pod seats. These were configured as 2/3/2 and my seat mate talked half the flight with a friend across the isle, loudly. Very uncouth.

Both of our Business Class seats were broken. I'm sure they didn't just break before we boarded but were broken prior. They would not recline. We could sit up straight or lie down, nothing that would allow us to sit back and relax on a 12 hour flight. Totally unacceptable. Very expensive and a waste or money.

The ground crew members at check in counter were courteous. The boarding was seamless. Flight departed as scheduled. Service on board was great

Turkish Airlines lost my reservation!!! I had the ticket, the receipt and they lost it!! Because the flight was fully booked, I had to wait 8 hours!!! Turkish Airlines provided me with NO FOOD, NO WATER!!! Absolutely ridiculous. They were pathetic. They admitted it was their fault for losing my reservation but provided me with nothing.

everything was excellent except for the meal on the fight from the Istanbul which was disgusting, the only choice of food available was pasta which was served frozen.

It was a safe flight with a friendly cabin crew.

The flight was never confirmed, I was not sent a ticket, and my account was charged for this flight. I’m trying to get my money back for a flight that was not booked or confirmed. Terrible experience

The plane was too hot inside. There was no entertainment and we had to sit on the plane for one hour before takeoff. There was no free wifi.

Online check-in was unavailable for my flight. So I waited 40 min in the queue at the check-in counter. Then, unlike any other airline in the world (and I am a very frequent international flyer) Pegasus was adamant that my CPAP was just another carry on and that I had to pay extra for it. Then, after I had paid in advance for a seat, they insisted I could not sit in an exit row because I was over 60 years old (I'm clearly in good shape and buy exit row seats more or less weekly). We pushed back harder and harder and insisted on talking to the station chief, who spoke with the counter staff by phone (not to me) and eventually relented. Experience on boarf was ok-- for a budget airline.

You adjourned my flight by 1h 30 mns and only updated me 1h30 mns before the new scheduled flight. I submitted an email to Kayak asking for a refund. It was the most stressful experience I've had.

Not because when i try to do check in there is only in turkish language i can not select other language

https://www.instagram.com/reel/DGVSRsasQcG/?igsh=dmkxa2s1eHNlbHZs

Don't fly Pegasus, terrible service at the airport and boarding was really bad. Both flights I took with them were significantly late. This flight had us all changing the gate at the last moment and it was chaos.withour explanation or apology. The planes have seats that don't recline and seats are really hard. The crew on board was good both flights, but that is the only positive thing I can say about this airline. It's not worth it and I won't be flying them again.

The airport staff were some of the worst I've ever flown, and I fly at least 50x every year. From the staff at the gate, to the check in staff, to the ticketing sales staff. My experience in Instanbul was so bad Ill.never fly Pegasus again. They were incredibly rude, dismissive and not helpful whatsoever. This is the worst of the worst if you want to fly a budget airline I'd go elsewhere. The airplane seats are really uncomfortable and don't recline at all, you get charged for every single thing so in the end you will pay more flying with them. The crew on the plane were the only kind people we encountered with Pegasus.

Pegasus Airlines which is the most efficient and cost worth low cost airline all over the Europe

Everything you need to know for your flight from Sofia to Istanbul

Information on your arrival and departure airports