IST - SOF

$71 Find Cheap Flights from Istanbul to Sofia

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Istanbul to Sofia departing on 5/1. 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 Sofia

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

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Everything you should know

Cheapest round-trip
$130
Typical prices: $122-$259
Turkish Airlines
Fri 4/10Sun 4/12
IST - SOF • Non-stop
Cheapest one-way
$71
Typical prices: $77-$164
Turkish Airlines
Fri 5/1
IST - SOF • Non-stop
Top airlines
Cheapest • from $130 (round-trip)
Best reviews • 7.3 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with Turkish Airlines. Average duration is 1h 16m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Avoid delays
Most punctual • 88% on-time
Best time • Fewest delays
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 27% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 29% 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 100s of sites at once to find you the best travel deals.
We hope you love your trip to Sofia!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Istanbul to Sofia (IST-SOF)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Istanbul to Sofia 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 round-trip flight deals from Istanbul to Sofia

Fri, Apr 10 - Sun, Apr 12
Turkish Airlines Logo
12:00 pm - 1:15 pm
IST
-
SOF
1h 15mnonstop
Turkish Airlines Logo
2:05 pm - 3:35 pm
SOF
-
IST
1h 30mnonstop
$130Turkish Airlines
Wed, Apr 8 - Wed, Apr 15
Turkish Airlines Logo
1:45 pm - 3:00 pm
IST
-
SOF
1h 15mnonstop
Turkish Airlines Logo
3:50 pm - 5:20 pm
SOF
-
IST
1h 30mnonstop
$133Turkish Airlines
Tue, Apr 7 - Tue, Apr 14
Turkish Airlines Logo
1:45 pm - 3:00 pm
IST
-
SOF
1h 15mnonstop
Turkish Airlines Logo
3:50 pm - 5:20 pm
SOF
-
IST
1h 30mnonstop
$137Turkish Airlines
Wed, Apr 1 - Wed, Apr 15
Turkish Airlines Logo
6:25 pm - 7:45 pm
IST
-
SOF
1h 20mnonstop
Turkish Airlines Logo
3:50 pm - 5:20 pm
SOF
-
IST
1h 30mnonstop
$138Turkish Airlines
Wed, Apr 8 - Wed, Apr 15
Multiple Airlines Logo
1:45 pm - 3:00 pm
IST
-
SOF
1h 15mnonstop
Multiple Airlines Logo
2:20 pm - 8:40 am
SOF
-
IST
18h 20m
1 stop
$142Multiple Airlines
Wed, Jun 17 - Wed, Jun 17
Turkish Airlines Logo
1:45 pm - 3:00 pm
IST
-
SOF
1h 15mnonstop
Turkish Airlines Logo
9:05 pm - 10:35 pm
SOF
-
IST
1h 30mnonstop
$146Turkish Airlines
Sat, Apr 25 - Sat, May 2
Turkish Airlines Logo
1:45 pm - 3:00 pm
IST
-
SOF
1h 15mnonstop
Turkish Airlines Logo
3:50 pm - 5:20 pm
SOF
-
IST
1h 30mnonstop
$159Turkish Airlines
Sun, May 10 - Wed, May 13
Turkish Airlines Logo
12:00 pm - 1:15 pm
IST
-
SOF
1h 15mnonstop
Turkish Airlines Logo
3:50 pm - 5:20 pm
SOF
-
IST
1h 30mnonstop
$160Turkish Airlines
Wed, Apr 1 - Wed, Apr 15
Multiple Airlines Logo
9:40 am - 5:50 pm
IST
-
SOF
8h 10m
1 stop
Multiple Airlines Logo
3:50 pm - 5:20 pm
SOF
-
IST
1h 30mnonstop
$162Multiple Airlines
Fri, May 1 - Mon, May 4
Multiple Airlines Logo
2:00 am - 11:10 am
IST
-
SOF
9h 10m
1 stop
Multiple Airlines Logo
9:05 pm - 10:35 pm
SOF
-
IST
1h 30mnonstop
$169Multiple Airlines
Booking Insights

KAYAK's insights & trends for Istanbul to Sofia flights

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

How much is a round-trip flight from Istanbul Airport to Sofia?

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

What’s the cheapest day of the week to fly from Istanbul to Sofia?

The average price of all round-trip flights from Istanbul Airport to Sofia clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Sofia on a Monday and more expensive on a Tuesday. On your return trip to Istanbul, you should consider flying back on a Friday, and avoid Sundays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Istanbul Airport to Sofia, 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 Istanbul Airport to Sofia is December, where tickets cost $112 (return) on average. On the other hand, the most expensive months are November and March, where the average cost of round-trip tickets is $211 and $200 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Istanbul Airport to Sofia, 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 Istanbul Airport to Sofia, you should book around 2 weeks before departure, which saves you about 27% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 17 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$71
Best time to beat the crowds but there is an average 10% increase in price.
Most popular time to fly and prices are also 18% lower on average.
Flight from Istanbul to Sofia

When to book flights from Istanbul to Sofia

Are your dates flexible? Find out the best times to travel from Istanbul to Sofia based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips 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 Istanbul to Sofia flights

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

    In the last 3 days, the lowest price for a flight from Istanbul Airport to Sofia was $71 for a one-way ticket and $130 for a round-trip.

  • Do I need a passport to fly between Istanbul and Sofia?

    Yes, you’ll need a passport to travel to Sofia from Istanbul.

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

    The Airbus A321-100/200 is the aircraft model that flies most regularly on the Istanbul to Sofia flight route.

  • Which airline alliances offer flights from Istanbul to Sofia?

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

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

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

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

    The two airlines most popular with KAYAK users for flights from Istanbul to Sofia are Turkish Airlines and Pegasus Airlines. With an average price for the route of $242 and an overall rating of 7.3, Turkish Airlines is the most popular choice. Pegasus Airlines is also a great choice for the route, with an average price of $120 and an overall rating of 6.7.

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

    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 Istanbul to Sofia.

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

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

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

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Sofia with an airline and back to Istanbul with another airline. Booking your flights between Istanbul and SOF can sometimes prove cheaper using this method.

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

    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 Sofia from Istanbul 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 Istanbul Airport to Sofia

  • Looking for a cheap flight? 25% of our users found flights on this route for $149 or less one-way.

Prefer to fly direct from Istanbul to Sofia?

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

Direct departures

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

Direct returns

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

Reviews of the top airlines flying from Istanbul to Sofia

 
See real verified KAYAK customer reviews for airlines flying from Istanbul to Sofia. 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 Istanbul to Sofia? 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.
7.3
Turkish AirlinesOverall score based on 4253 reviews
7.5Entertainment
7.8Crew
7.3Boarding
7.3Comfort
7.5Food
Airline reviews

Extremely bad BAD BAD BAD. NEVER TURKISH AIRLINES EVER AGAIN..PIRATES COMPANY.

2.0 MediocreAnonymous, Mar 2026
IST - LAX
Read more Turkish Airlines reviews

Extremely bad BAD BAD BAD. NEVER TURKISH AIRLINES EVER AGAIN..PIRATES COMPANY.

The crew checked the immigration laws very quickly for Russian citizenship and confirmed our FVTF for Singapore for 96 hrs. Thank you.

The connecting flight experience was okay. Flight crew's service were great upon settling. However, it wasn't the same as previous flight. Flight crew were okay - friendly, however, not as accommodating.

Typically great service from Turkish with comfortable seat and amenitie, good food and great attention from staff.

Delicious food, comfortable and clean plane. It's a little cramped in the hall in front of the gate.

Our flight was delayed for one hour is their a credit?

two of our bags didn't arrive - this is nonsense given we weren't connecting from anywhere and the flight wasn't full so there shouldn't have been a weight problem. Also, business class and star alliance gold, my bags should have been prioritized.

Went great, they even reopened the gate for me when I arrived late.

Very hot cabin made long flight uncomfortable, even in business class! Food was great. Istanbul business lounge had great food but too few bathrooms and seating . They also need more electric outlets for charging devices. Appreciate the ability to go through fast track lines w business class

The crew on this flight provided exceptional business class service to me.

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 Istanbul to Sofia

Information on your arrival and departure airports