HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Istanbul

$77+ Cheap flights from Sofia (SOF) to Istanbul (IST)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/10. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — IST
Feb 26 — Mar 51
Thu 2/26
Thu 3/5
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Sofia to Istanbul with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.
Cheapflights Tip: The best prices from Sofia to Istanbul are usually found in June or March, booked 31 days in advance, depart on a Monday or Tuesday and return on a Friday

Cheap flight deals from Sofia to Istanbul

Cheapest flights from Sofia to Istanbul
Explore the most affordable flight options available from Sofia to Istanbul. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 27, 2026.

This Booking.com deal was found by Cheapflights users on 1/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/253:50 pm
SOF
-
IST
Nonstop1h 30m
Turkish Airlines
Sun 5/312:00 pm
IST
-
SOF
Nonstop1h 15m
Turkish Airlines
Deal found 1/25$138
This Mytrip deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/203:50 pm
SOF
-
IST
Nonstop1h 30m
Turkish Airlines
Thu 4/231:45 pm
IST
-
SOF
Nonstop1h 15m
Turkish Airlines
Deal found 1/27$139
This Mytrip deal was found by Cheapflights users on 1/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/116:00 am
SOF
-
IST
1 stop14h 05m
Multiple Airlines
Wed 3/182:35 pm
IST
-
SOF
1 stop9h 55m
Multiple Airlines
Deal found 1/25$147
This Mytrip deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/86:00 am
SOF
-
IST
1 stop14h 05m
Multiple Airlines
Sat 3/1410:00 pm
IST
-
SOF
1 stop16h 30m
Multiple Airlines
Deal found 1/26$157
This Mytrip deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/207:30 pm
SOF
-
IST
1 stop17h 40m
Multiple Airlines
Thu 4/238:15 pm
IST
-
SOF
1 stop17h 20m
Multiple Airlines
Deal found 1/27$161
This Mytrip deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/116:05 am
SOF
-
IST
1 stop13h 45m
Multiple Airlines
Sun 2/1510:40 am
IST
-
SOF
1 stop7h 30m
Multiple Airlines
Deal found 1/26$172
This Kiwi.com deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/64:00 pm
SOF
-
IST
Nonstop1h 30m
Multiple Airlines
Mon 3/910:10 am
IST
-
SOF
1 stop7h 00m
Multiple Airlines
Deal found 1/26$174
This Mytrip deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/2410:45 pm
SOF
-
IST
2 stops21h 20m
Multiple Airlines
Tue 3/310:10 am
IST
-
SOF
1 stop12h 40m
Multiple Airlines
Deal found 1/26$177
This Mytrip deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/131:30 pm
SOF
-
IST
2 stops19h 10m
Multiple Airlines
Sun 2/1510:40 am
IST
-
SOF
1 stop7h 30m
Multiple Airlines
Deal found 1/26$179
This Kiwi.com deal was found by Cheapflights users on 1/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/258:55 pm
SOF
-
IST
1 stop11h 50m
Multiple Airlines
Sun 5/312:00 pm
IST
-
SOF
Nonstop1h 15m
Multiple Airlines
Deal found 1/25$190

Find flight deals from Sofia to Istanbul

Discover tips and strategies to find the most affordable flight options for your journey from Sofia (SOF) to Istanbul (IST). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$138
(Booking.com)

One-way from

$77
(Kiwi.com)

Popular in

April

Cheapest in

June

Average price

$124

Good round-trip deal

$741 or less

Good one-way deal

$302 or less
Provider with most accurate pricing for Sofia-Istanbul flight deals.
Search Deals
Provider most trusted by Cheapflights users for Sofia-Istanbul flights.
Search Deals
From Sofia to Istanbul
Search Deals
One-way flight from Sofia to Istanbul
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($2 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($3 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals
Price to beat on a round-trip flight from Sofia to Istanbul.
Search Deals
Price to beat on a one-way flight from Sofia to Istanbul.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Sofia to Istanbul that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 27, 2026.
Use the filters below to find and compare flights from Sofia to Istanbul Airport that are best for you.

Fly from

Sofia

Fly to

Istanbul

Route

Depart

Return

Price

SofiaIstanbul

SOF - IST

SOFIST

Sofia

Mon 4/20

7:30 pm-1:10 pm

1 stop17h 40m

Istanbul

Thu 4/23

8:15 pm-1:35 pm

1 stop17h 20m

$161

SofiaIstanbul

SOF - IST

SOFIST

Sofia

Wed 2/11

6:05 am-8:50 pm

1 stop13h 45m

Istanbul

Sun 2/15

10:40 am-5:10 pm

1 stop7h 30m

$172

SofiaIstanbul

SOF - IST

SOFIST

Sofia

Tue 2/24

10:45 pm-9:05 pm

2 stops21h 20m

Istanbul

Tue 3/3

10:10 am-9:50 pm

1 stop12h 40m

$177

SofiaIstanbul

SOF - IST

SOFIST

Sofia

Fri 2/13

1:30 pm-9:40 am

2 stops19h 10m

Istanbul

Sun 2/15

10:40 am-5:10 pm

1 stop7h 30m

$179

SofiaIstanbul

SOF - IST

SOFIST

Sofia

Sat 5/2

3:50 pm-5:20 pm

Nonstop1h 30m

Istanbul

Wed 5/6

6:55 pm-8:15 pm

Nonstop1h 20m

$194

SofiaIstanbul

SOF - IST

SOFIST

Sofia

Fri 3/6

4:00 pm-6:30 pm

Nonstop1h 30m

Istanbul

Mon 3/9

8:30 pm-8:50 pm

Nonstop1h 20m

$199

SofiaIstanbul

SOF - IST

SOFIST

Sofia

Thu 3/12

4:00 pm-4:10 am

1 stop11h 10m

Istanbul

Sun 3/15

4:40 pm-3:05 am

1 stop11h 25m

$207

SofiaIstanbul

SOF - IST

SOFIST

Sofia

Sat 5/2

4:05 pm-3:40 am

1 stop11h 35m

Istanbul

Wed 5/6

3:45 pm-3:00 am

1 stop11h 15m

$207

SofiaIstanbul

SOF - IST

SOFIST

Sofia

Tue 2/17

10:45 pm-9:30 am

1 stop9h 45m

$86

SofiaIstanbul

SOF - IST

SOFIST

Sofia

Wed 2/18

6:00 am-8:50 pm

1 stop13h 50m

$98

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 18 results
1
2

Compare providers for flights from Sofia to Istanbul

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Sofia to Istanbul in January.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
SmartFaresPrice Accuracy1 starTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Sofia-Istanbul Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Sofia-Istanbul Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Sofia-Istanbul Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Sofia-Istanbul Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Sofia-Istanbul Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Sofia to Istanbul

Have a flexible travel schedule? Discover the best time to fly to Istanbul from Sofia with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Sofia to Istanbul Airport

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

Use this chart to determine the optimal time to book a round-trip flight from Sofia to Istanbul. Price data was last updated on January 23, 2026.

Booking 31 days in advance of your planned departure date is, on average, the best time to get cheap flights from Sofia to Istanbul Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Sofia to Istanbul Airport?

Currently, October is the cheapest month in which you can book a flight from Sofia to Istanbul Airport (average of $74). Flying from Sofia to Istanbul Airport in May is currently the most expensive (average of $101). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SOF to IST?

Find hourly flight availability from Sofia to Istanbul. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 27, 2026.

It’s optimal to fly from Sofia to Istanbul Airport in the afternoon. By choosing this option you can save up to 26% on the cost of your flight, compared to a flight in the evening.

How much does it cost to fly round-trip from Sofia to Istanbul Airport?

Reviews of airlines servicing Istanbul

Get insights into the airlines that provide service to Istanbul. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Istanbul. Reviews last updated January 27, 2026.
Get a feel of what it's like to fly with Turkish Airlines and Pegasus Airlines from Sofia to Istanbul Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Turkish Airlines
7.3
Good
4,207 reviews

Overall

7.3

Comfort

7.3

Boarding

7.3

Entertainment

7.4

Crew

7.8

Food

7.4

Reviews

1 / 20
6.0
Good

Anonymous,Jan 2026

NQZ - IST

First of all, my flight got delayed. When I had a registration in Astana, the girl who was working on a desk was too lazy to fill out my info and that’s why she gave me only 2 tickets instead of 3. While boarding I realized it and had to talk to another worker who was solving this problem. My seat was near emergency door, people in front were reclining their seats, but I couldn’t- that made me have a little space to sit, move, etc. That was really uncomfortable. So the flight itself also took longer and I didn’t have time to reach another gate for next flight, even tho flight attendant said plane will be in time. I had to go to Turkish Airlines main office, most of workers didn’t speak enough good English to explain properly where it is. It also took me like 1,5 hours to solve. I was not satisfied with the flight at all this time.
Turkish Airlines
7.3
Good
4,207 reviews
Turkish Airlines
7.3
Good
4,207 reviews

Overall

7.3

Comfort

7.3

Boarding

7.3

Entertainment

7.4

Crew

7.8

Food

7.4

Reviews

1 / 20
6.0
Good

Anonymous,Jan 2026

NQZ - IST

First of all, my flight got delayed. When I had a registration in Astana, the girl who was working on a desk was too lazy to fill out my info and that’s why she gave me only 2 tickets instead of 3. While boarding I realized it and had to talk to another worker who was solving this problem. My seat was near emergency door, people in front were reclining their seats, but I couldn’t- that made me have a little space to sit, move, etc. That was really uncomfortable. So the flight itself also took longer and I didn’t have time to reach another gate for next flight, even tho flight attendant said plane will be in time. I had to go to Turkish Airlines main office, most of workers didn’t speak enough good English to explain properly where it is. It also took me like 1,5 hours to solve. I was not satisfied with the flight at all this time.
Pegasus Airlines
6.7
Okay
636 reviews
Turkish Airlines
7.3
Good
4,207 reviews

Overall

7.3

Comfort

7.3

Boarding

7.3

Entertainment

7.4

Crew

7.8

Food

7.4

Reviews

1 / 20
6.0
Good

Anonymous,Jan 2026

NQZ - IST

First of all, my flight got delayed. When I had a registration in Astana, the girl who was working on a desk was too lazy to fill out my info and that’s why she gave me only 2 tickets instead of 3. While boarding I realized it and had to talk to another worker who was solving this problem. My seat was near emergency door, people in front were reclining their seats, but I couldn’t- that made me have a little space to sit, move, etc. That was really uncomfortable. So the flight itself also took longer and I didn’t have time to reach another gate for next flight, even tho flight attendant said plane will be in time. I had to go to Turkish Airlines main office, most of workers didn’t speak enough good English to explain properly where it is. It also took me like 1,5 hours to solve. I was not satisfied with the flight at all this time.

Related info for your journey

Find useful and relevant information for your journey from Sofia to Istanbul. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Sofia to Istanbul?

    Most people fly from Sofia (SOF) if they book a flight from Sofia to Istanbul. On average, Sofia has 4 outbound flights to Istanbul per day from 2 airlines. Sofia is conveniently located just 4.2 mi from Sofia’s city center.

  • What are the cheapest airlines flying from Sofia to Istanbul Airport round-trip?

    Currently priced at $90, Pegasus Airlines will fly you from Sofia to Istanbul Airport and back. In addition to Pegasus Airlines, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on Turkish Airlines for as low as $136. Users have found that Pegasus Airlines is 31% cheaper than the other options available to this destination.

  • What are the most reliable airlines from Sofia to Istanbul Airport?

    No one likes to see their flight delayed. When booking a flight from Sofia to Istanbul Airport consider choosing Turkish Airlines (70%), IndiGo (70%) or Egyptair (59%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Sofia to Istanbul Airport?

    The cheapest flight price from Sofia to Istanbul Airport is $137. On average you can expect to pay $1,295. The most popular route, (Sofia - Istanbul), can usually be booked for $96.

  • Can I find deals for flights from Sofia to Istanbul that include hotel bookings?

    Yes. In addition to deals on Sofia to Istanbul flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Sofia to Istanbul?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Sofia to Istanbul.

  • Can I find deals for business class flights from Sofia to Istanbul?

    Yes. Cheapflights offers flight deals from Sofia to Istanbul by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, October is the cheapest month in which you can book a flight from Sofia to Istanbul Airport (average of $74). Flying from Sofia to Istanbul Airport in May is currently the most expensive (average of $101). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Istanbul Airport?

Book flights to Istanbul Airport if you plan to visit one of these locations
Yalova

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 2 airlines flying from Sofia to Istanbul

Discover the top 2 airlines that operate flights from Sofia to Istanbul. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
Pegasus AirlinesCheapest$90Average$112FlexibilityNo cancel feeOn-time82%
Turkish AirlinesCheapest$136Average$201FlexibilityNo cancel feeOn-time77%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.