SOF - IST

£67 Find Cheap Flights from Sofia to Istanbul – Compare and Save

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 13/10. 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

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Everything you should know

Cheapest return fare
£137
Typical prices: £82-£125
Air Serbia
Mon 28/12Thu 7/1
SOF - IST • 1 stop
Cheapest direct flights
£155
Typical prices: £82-£150
Turkish Airlines
Sat 1/8Sun 2/8
SOF - IST • Direct
Top airlines
Cheapest • from £137 (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 • 91% on-time
Best time • Fewest delays
Insights
Insights
Insights
Insights
When to travel
Cheapest • 34% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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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

Mon, 28 Dec - Thu, 7 Jan
Air Serbia Logo
16:05 - 17:00
SOF
-
IST
23h 55m
1 stop
Air Serbia Logo
17:35 - 15:25
IST
-
SOF
22h 50m
1 stop
£137Air Serbia
Sat, 1 Aug - Sun, 2 Aug
Turkish Airlines Logo
15:50 - 17:20
SOF
-
IST
1h 30mdirect
Turkish Airlines Logo
13:45 - 15:00
IST
-
SOF
1h 15mdirect
£155Turkish Airlines
Sat, 1 Aug - Sun, 2 Aug
Turkish Airlines Logo
21:10 - 22:40
SOF
-
IST
1h 30mdirect
Turkish Airlines Logo
11:00 - 12:15
IST
-
SOF
1h 15mdirect
£156Turkish Airlines
Thu, 17 Sep - Tue, 22 Sep
Air Serbia Logo
05:00 - 03:40
SOF
-
IST
22h 40m
1 stop
Air Serbia Logo
04:25 - 15:30
IST
-
SOF
11h 05m
1 stop
£156Air Serbia
Mon, 28 Dec - Tue, 5 Jan
Air Serbia Logo
16:05 - 17:00
SOF
-
IST
23h 55m
1 stop
Air Serbia Logo
05:30 - 15:25
IST
-
SOF
10h 55m
1 stop
£157Air Serbia
Sun, 16 Aug - Tue, 18 Aug
Turkish Airlines Logo
15:50 - 17:20
SOF
-
IST
1h 30mdirect
Turkish Airlines Logo
07:30 - 08:45
IST
-
SOF
1h 15mdirect
£167Turkish Airlines
Sat, 1 Aug - Wed, 5 Aug
Multiple Airlines Logo
15:50 - 17:20
SOF
-
IST
1h 30mdirect
Multiple Airlines Logo
09:40 - 17:50
IST
-
SOF
8h 10m
1 stop
£168Multiple Airlines
Sat, 1 Aug - Wed, 5 Aug
Turkish Airlines Logo
15:50 - 17:20
SOF
-
IST
1h 30mdirect
Turkish Airlines Logo
13:45 - 15:00
IST
-
SOF
1h 15mdirect
£169Turkish Airlines
Tue, 13 Oct - Fri, 16 Oct
Multiple Airlines Logo
16:00 - 03:40
SOF
-
IST
11h 40m
1 stop
Multiple Airlines Logo
07:30 - 08:45
IST
-
SOF
1h 15mdirect
£171Multiple Airlines
Sat, 1 Aug - Wed, 5 Aug
Multiple Airlines Logo
20:55 - 08:45
SOF
-
IST
11h 50m
1 stop
Multiple Airlines Logo
09:25 - 15:00
IST
-
SOF
5h 35m
1 stop
£177Multiple 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 December.

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 £82 (return) on average. On the other hand, the most expensive months are June and May, where the average cost of round-trip tickets is £180 and £167 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£67
Best time to beat the crowds (10% less expensive on average)
Most popular time to fly (18% more expensive 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 £67 for a one-way ticket and £137 for a return.

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

    flydubai, and Emirates 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 £183 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 £87 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 £207 or less one-way and £206 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 4439 reviews
7.5Food
7.3Boarding
7.3Comfort
7.8Crew
7.5Entertainment
Airline reviews

I paid for the seat and found out that the seat doesn't recline. The staff didn't help in arranging an alternative.

4.0 OkayNauman, Jun 2026
RUH - IST
Read more Turkish Airlines reviews

I paid for the seat and found out that the seat doesn't recline. The staff didn't help in arranging an alternative.

Turkish airline does not care if the business class senior person has to go from one terminal to another. no guidance, no trolley, I would not travel on this airline again and also tell my friends.

Amazing! One of the best kept secrets in air travel!

We fly Bussines class and we didn’t feel like it is. Out luggage didn’t arrive and we have to return again next day from our hotel to airport to get them. Still waiting. No information from Turkish airlines Very poor customer service I think booking through kayak it was wrong decision

Three screaming and crying children in business class made it very difficult to rest. The crew made no attempt to address the situation. I might as well have saved the money and flown economy. The parents were oblivious to the discomfort their children were causing. The lounge in Istanbul is wonderful, but did not make up for the misery on the flight. My business class seat power outlet was broken and I have a cpap. The crew couldn't fix it or move me to better seat. Fortunately , the passenger in front of me allowed me to plug into his power outlet.

My seat/bed broke. Flight was delayed. Most of the cabin crew were very pleasant. Amenity kit was nice. Chairs and cabin was worn. Food was mostly quite nice.

I flew Business with my daughter and son. The service, friendliness of the staff and the comfort of the fully flat beds were phenomenal. Would definitely fly Turkish again soon.

I had 2 flights on the same day ( beautiful sunny non windy day)both had a touch and go -around on the runway. My husband said they were training a co pilot. The bathrooms were stinky dirty and the the floor was sticky. On one flight I had the worst food option I have ever had on an overseas flight.

The seats were extremely small. Boarding was not communicated correctly. It wasn’t a pleasant trip.

Loved the food. No wheelchair was provided in Sofia even though wheelchair assistance was confirmed by Turkish Airlines

Great flight and great crew. Many thanks to them for their hard work making our trip so relaxing.

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.

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

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.

The crew were outstandingly kind and cheerful. We carried our cat and they offered help.

Late departure. No announcements. Boarding was a disaster. Some kind of technical issue scanning boarding passes.

It was like moving cattle around. Very abrupt, uncomfortable and not much hospitality

All good but air not give the pasing er any food even glase of water

Flight delayed by 1hr when we already boarded because someone had to get off. Leg room is terrible for 6ft people like me.

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

Information on your arrival and departure airports