Cheap flights from Sofia to Istanbul from $90

In general, October is the cheapest month to fly from Sofia to Istanbul Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $114. If you don’t want to visit Istanbul Airport in October, then you should wait until June to fly from Sofia, when ticket prices are also cheap, with an average price of $117.

Our data shows that Wednesday is the least expensive day to fly to Istanbul Airport. Tickets to fly out on this day can be as low as $798. On the other hand, Sunday is the most expensive day to depart from Sofia because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $939.

At noon is the cheapest time of day to fly from Sofia to Istanbul Airport when you can find flight prices for as low as $262. Flying to Istanbul Airport at noon is an ideal time because this is during off-peak travel hours. Flights in the evening are often more expensive with an average ticket price of $958.

Fly from Sofia to Istanbul for the best Sofia - Istanbul flight prices

You are more likely to see cheaper flights to Istanbul Airport from Sofia when booking weeks ahead of your departure date. In general, you can expect to find flights to Istanbul Airport for around $140 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Istanbul Airport from Sofia for as low as $123 on momondo.

There are 3 cabin classes available to choose from on Sofia to Istanbul flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Historically, on average around 9% of flights between Sofia and Istanbul have experienced a delay on any given week. The average delay length over the past 12 months has been 107 minutes.

Generally, flights departing in the evening tend to experience fewer delays. Flights at night have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

According to our data, Turkish Airlines have had the least number of delays on this route over the last 12 months; with about 9% of their flights experiencing any sort of delay.

As of April 2026, there are 4 flights per day flying from Sofia to Istanbul Airport. The most common time of day flights depart is 9:00AM, with 58% of flights taking off at noon.

As of April 2026, there are 33 flights per week flying from Sofia to Istanbul Airport. The most common day of the week flights depart is Mon, with 27% of flights taking off on this day.