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$75+ 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 6/16. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — IST
May 24 — May 311
Sun 5/24
Sun 5/31
1 adult, Economy
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Cheapflights Tip: The best prices from Sofia to Istanbul are usually found in October or June, booked 71 days in advance, depart on a Wednesday or Monday 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 April 24, 2026.

This Air Serbia deal was found by Cheapflights users on 4/20. 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 Air Serbia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/64:00 pm
SOF
-
IST
1 stop23h 00m
Air Serbia
Mon 6/84:30 am
IST
-
SOF
1 stop11h 00m
Air Serbia
Deal found 4/20$187
This Air Serbia deal was found by Cheapflights users on 4/20. 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 Air Serbia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/194:00 pm
SOF
-
IST
1 stop23h 00m
Air Serbia
Thu 5/214:30 am
IST
-
SOF
1 stop22h 30m
Air Serbia
Deal found 4/20$188
This Air Serbia deal was found by Cheapflights users on 4/21. 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 Air Serbia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/24:00 pm
SOF
-
IST
1 stop23h 00m
Air Serbia
Tue 6/94:30 am
IST
-
SOF
1 stop11h 00m
Air Serbia
Deal found 4/21$189
This Kiwi.com deal was found by Cheapflights users on 4/22. 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 6/68:55 pm
SOF
-
IST
1 stop11h 50m
Multiple Airlines
Sat 6/131:45 pm
IST
-
SOF
Nonstop1h 15m
Multiple Airlines
Deal found 4/22$190
This Kiwi.com deal was found by Cheapflights users on 4/23. 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.
Thu 5/215:00 am
SOF
-
IST
1 stop10h 55m
Multiple Airlines
Thu 5/281:45 pm
IST
-
SOF
Nonstop1h 15m
Multiple Airlines
Deal found 4/23$191
This Kiwi.com deal was found by Cheapflights users on 4/24. 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.
Thu 5/75:00 am
SOF
-
IST
1 stop10h 55m
Air Serbia
Mon 5/114:40 pm
IST
-
SOF
1 stop22h 50m
Air Serbia
Deal found 4/24$193
This SmartFares deal was found by Cheapflights users on 4/22. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/23:50 pm
SOF
-
IST
Nonstop1h 30m
Turkish Airlines
Sun 5/31:45 pm
IST
-
SOF
Nonstop1h 15m
Turkish Airlines
Deal found 4/22$202
This SmartFares deal was found by Cheapflights users on 4/22. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/262:05 pm
SOF
-
IST
Nonstop1h 30m
Turkish Airlines
Tue 4/281:45 pm
IST
-
SOF
Nonstop1h 15m
Turkish Airlines
Deal found 4/22$203
This Kiwi.com deal was found by Cheapflights users on 4/24. 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.
Mon 5/113:50 pm
SOF
-
IST
Nonstop1h 30m
Multiple Airlines
Tue 6/29:25 am
IST
-
SOF
1 stop6h 55m
Multiple Airlines
Deal found 4/24$204
This Kiwi.com deal was found by Cheapflights users on 4/24. 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 5/23:50 pm
SOF
-
IST
Nonstop1h 30m
Turkish Airlines
Tue 5/51:45 pm
IST
-
SOF
Nonstop1h 15m
Turkish Airlines
Deal found 4/24$207
This Kiwi.com deal was found by Cheapflights users on 4/24. 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.
Tue 4/283:50 pm
SOF
-
IST
Nonstop1h 30m
Turkish Airlines
Fri 5/81:45 pm
IST
-
SOF
Nonstop1h 15m
Turkish Airlines
Deal found 4/24$208
This Booking.com deal was found by Cheapflights users on 4/21. 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.
Wed 4/223:50 pm
SOF
-
IST
Nonstop1h 30m
Turkish Airlines
Fri 4/2412:00 pm
IST
-
SOF
Nonstop1h 15m
Turkish Airlines
Deal found 4/21$209

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 April 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$187
(Air Serbia)

One-way from

$75
(Kiwi.com)

Popular in

February

Cheapest in

October

Average price

$156

Good round-trip deal

$735 or less

Good one-way deal

$256 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. 6% potential increase in price ($9 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($3 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 24, 2026.
Use the filters below to find and compare flights from Sofia to Istanbul Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SofiaIstanbul

SOF - IST

SOFIST

Sofia

Tue 5/19

4:00 pm-3:00 pm

1 stop23h 00m

Istanbul

Thu 5/21

4:30 am-3:00 am

1 stop22h 30m

$188

SofiaIstanbul

SOF - IST

SOFIST

Sofia

Mon 6/8

4:00 pm-3:40 am

1 stop11h 40m

Istanbul

Mon 6/15

4:30 am-3:30 pm

1 stop11h 00m

$215

SofiaIstanbul

SOF - IST

SOFIST

Sofia

Mon 5/25

5:00 am-3:40 am

1 stop22h 40m

Istanbul

Fri 6/12

4:30 am-3:30 pm

1 stop11h 00m

$229

SofiaIstanbul

SOF - IST

SOFIST

Sofia

Sat 6/6

4:00 pm-3:00 pm

1 stop23h 00m

Istanbul

Sat 6/13

4:40 pm-3:30 pm

1 stop22h 50m

$230
Quickest round-trip

SofiaIstanbul

SOF - IST

SOFIST

Sofia

Sat 8/29

5:00 am-3:55 pm

1 stop10h 55m

Istanbul

Mon 9/7

4:30 am-3:30 pm

1 stop11h 00m

$230

SofiaIstanbul

SOF - IST

SOFIST

Sofia

Thu 5/7

4:00 pm-3:40 am

1 stop11h 40m

Istanbul

Mon 5/11

4:40 pm-3:30 pm

1 stop22h 50m

$230

SofiaIstanbul

SOF - IST

SOFIST

Sofia

Wed 5/27

4:00 pm-3:40 am

1 stop11h 40m

Istanbul

Wed 6/3

4:30 am-3:30 pm

1 stop11h 00m

$230
Cheapest one-way

SofiaIstanbul

SOF - IST

SOFIST

Sofia

Mon 5/25

5:00 am-3:40 am

1 stop22h 40m

$92

SofiaIstanbul

SOF - IST

SOFIST

Sofia

Thu 5/7

4:00 pm-3:40 am

1 stop11h 40m

$92

SofiaIstanbul

SOF - IST

SOFIST

Sofia

Mon 9/28

5:00 am-3:40 am

1 stop22h 40m

$92

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/21

Showing 1-10 of 15 resultsSorted by cheapest first
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 April.
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?

Booking 70 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 $114). Flying from Sofia to Istanbul Airport in February is currently the most expensive (average of $162). 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 April 24, 2026.

It’s optimal to fly from Sofia to Istanbul Airport at noon. By choosing this option you can save up to 25% 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 April 24, 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
7.4
Good
4,325 reviews

Crew

7.8

Comfort

7.3

Food

7.5

Overall

7.4

Boarding

7.3

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Scout,Mar 2026

UBN - IST

The boarding process is definitely not as smooth as some Asian airlines. But Turkish Airlines pleasantly surprised me with the quality of food - even vegetarian options - and the staff were so attentive and eager to please. Not the most comfortable seats, but luckily it was not a full flight and the staff were happy for us to spread and be comfortable.
Turkish Airlines
7.4
Good
4,325 reviews
Turkish Airlines
7.4
Good
4,325 reviews

Crew

7.8

Comfort

7.3

Food

7.5

Overall

7.4

Boarding

7.3

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Scout,Mar 2026

UBN - IST

The boarding process is definitely not as smooth as some Asian airlines. But Turkish Airlines pleasantly surprised me with the quality of food - even vegetarian options - and the staff were so attentive and eager to please. Not the most comfortable seats, but luckily it was not a full flight and the staff were happy for us to spread and be comfortable.
Pegasus Airlines
6.7
Okay
640 reviews
Turkish Airlines
7.4
Good
4,325 reviews

Crew

7.8

Comfort

7.3

Food

7.5

Overall

7.4

Boarding

7.3

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Scout,Mar 2026

UBN - IST

The boarding process is definitely not as smooth as some Asian airlines. But Turkish Airlines pleasantly surprised me with the quality of food - even vegetarian options - and the staff were so attentive and eager to please. Not the most comfortable seats, but luckily it was not a full flight and the staff were happy for us to spread and be comfortable.

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 8 outbound flights to Istanbul per day from 2 airlines. Sofia is conveniently located just 4.2 mi from Sofia’s city center.

  • How long is the flight from Sofia to Istanbul Airport?

    Air Serbia can get you from Sofia to Istanbul Airport in just under 23h. Your travel time can differ by up to . The distance from Sofia to Istanbul Airport is about 291 mi.

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

    Currently priced at $93, 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 33% 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 Lufthansa (100%), Turkish Airlines (81%) or IndiGo (74%) 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 $176. On average you can expect to pay $1,243. The most popular route, (Sofia - Istanbul), can usually be booked for $111.

  • 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 $114). Flying from Sofia to Istanbul Airport in February is currently the most expensive (average of $162). 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?

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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 April 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
Pegasus AirlinesCheapest$93Average$124FlexibilityNo cancel feeOn-time82%
Turkish AirlinesCheapest$136Average$199FlexibilityNo cancel feeOn-time77%

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