Best Airlines for Istanbul to Sofia Flights (IST – SOF)

Compare cheap flights from Istanbul to Sofia (IST–SOF) across popular airlines. Check departure times, flight duration, and direct vs. connecting options to find the best-value tickets, then book to lock in low fares. Current cheapest airline on this route: Pegasus Airlines.
Turkish Airlines logo Turkish Airlines
Airlines are determined based on actual purchased flight tickets from Istanbul to Sofia according to previous 12 months data from Trip.com.

Book direct and connecting flights from Istanbul (IST) to Sofia (SOF) from NZD 78 one-way and NZD 176 rounded trip. Compare prices for the next 3 months and find the cheapest dates to fly.

Displayed flight fares from Istanbul to Sofia are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Key Facts About Flights From Istanbul to Sofia

Get a quick overview of the Istanbul to Sofia route before you book. The table below highlights typical ticket prices, best travel months, flight distance, average journey time and the most popular airline.

Cheapest one-way flight priceNZD 78
Cheapest return ticket priceNZD 176
Off-season for travelOctober
Peak season for travelJanuary
Flight distance494.78 km
Average flight time1 hour 17 minutes
Popular airlineTurkish Airlines
Flight statistics for the Istanbul–Sofia route are based on aggregated booking data from Trip.com over the past 12 months.

Trip.com price insights on flights from Istanbul to Sofia

Which month has the cheapest one-way flights from Istanbul to Sofia?

The average price of one-way flights from Istanbul to Sofia purchased by Trip.com users by month over the past 12 months.

Based on Trip.com’s data, the cheapest month for flights from Istanbul to Sofia is July, with an average price of NZD 163; while the month with the highest flight price is usually May, with an average price of up to NZD 257.

NZD 257
NZD 210
NZD 163
NZD 116
    Cheapest
  • NZD 224
    Apr
  • NZD 257
    May
  • NZD 216
    Jun
  • NZD 163
    Jul
  • NZD 189
    Aug
  • NZD 166
    Sep
  • NZD 189
    Oct
  • NZD 227
    Nov
  • NZD 178
    Dec
  • NZD 199
    Jan
  • NZD 222
    Feb
  • NZD 208
    Mar

What is the cheapest month for round-trip flights from Istanbul to Sofia?

Average price of round-trip flights from Istanbul to Sofia purchased by Trip.com users by month over the past 12 months

According to historical data from Trip.com, the lowest prices for flights from Istanbul to Sofia are found during May, with an average price of NZD 257. Conversely, the highest prices are found during February, with an average price of up to NZD 685.

NZD 685
NZD 471
NZD 257
NZD 43
    Cheapest
  • NZD 385
    Apr
  • NZD 257
    May
  • NZD 437
    Jun
  • NZD 493
    Jul
  • NZD 526
    Aug
  • NZD 536
    Sep
  • NZD 331
    Oct
  • NZD 487
    Nov
  • NZD 372
    Dec
  • NZD 477
    Jan
  • NZD 685
    Feb
  • NZD 454
    Mar

What's the cheapest day to fly from Istanbul to Sofia?

Data is based on the average flight price for each day of the week from Istanbul to Sofia on Trip.com over the past 12 months.

Based on Trip.com data from the past 12 months, the cheapest day to fly from Istanbul to Sofia is Friday, with average prices lower than on other days. Avoid Sunday, as prices are usually highest then.

NZD 220
NZD 191
NZD 161
NZD 132
    Cheapest
  • NZD 212
    Mon
  • NZD 206
    Tue
  • NZD 199
    Wed
  • NZD 197
    Thu
  • NZD 161
    Fri
  • NZD 208
    Sat
  • NZD 220
    Sun

Frequently Asked Questions

  • What are the cheapest flights from Istanbul to Sofia (IST-SOF)?

    Based on Trip.com data, Pegasus Airlines offers one-way fares as low as NZD 78 on Cheapest nonstop routes (e.g. SAW to SOF on Tue, Jun 2), while Pegasus Airlines offers Cheapest nonstop round-trips from NZD 176 departing on Wed, Apr 8 and returning on Wed, Apr 15.
  • At the moment, you can catch a nonstop flight from Istanbul to Sofia with the following airlines, including: Turkish Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.
  • It takes about 1 hour 17 minutes to fly from Istanbul (IST) to Sofia (SOF).
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Istanbul to Sofia is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • Based on Trip.com data in the past 4 weeks, there is 29 flight per week flying from Istanbul to Sofia. You can check the weekly schedule for popular airlines on this route below: Turkish Airlines: S/M/T/W/T/F/S -- TK1031 (13:57)
  • To find best deals on flights from Istanbul to Sofia, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Tue, Jun 2, with one-way flights priced at just NZD 78.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Pegasus Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Sofia travel is around January.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Istanbul to Sofia is October, when demand for travel is lower.
  • After crunching the numbers on our April flight calendar, it's currently cheapest to fly from Istanbul to Sofia on April 8, 2026 with Pegasus Airlines, with prices starting at NZD 69.
  • You can land at any one of the following hubs in Sofia, with Istanbul Airport to Sofia International Airport (IST-SOF) is by far the most common option on this route: Sofia International Airport (SOF).
  • The time difference between Sofia and Istanbul is 1h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

Trip.com airline insights on flights from Istanbul to Sofia

Which airlines offer the cheapest nonstop flights from Istanbul to Sofia?

Data is based on the average price of all nonstop flights from Istanbul to Sofia on Trip.com in the past 12 months.

Based on Trip.com data from the past 12 months, Pegasus Airlines offers the cheapest nonstop flights from Istanbul to Sofia, with an average price of NZD 140.

NZD 85
NZD 140
NZD 195
NZD 250
NZD 305
Pegasus Airlines
NZD 140
Pegasus Airlines
Air Serbia
NZD 289
Air Serbia
AEGEAN
NZD 304
AEGEAN
Turkish Airlines
NZD 305
Turkish Airlines

Which airlines operate the most flights from Istanbul to Sofia?

Data is based on the number of flights from Istanbul to Sofia operated by each airline on Trip.com in the past month.

Based on Trip.com data from the past month, Turkish Airlines operates the most flights from Istanbul to Sofia, with 24 flight per week.

0
8
16
24
Turkish Airlines
24
Turkish Airlines
IndiGo
23
IndiGo
Pegasus Airlines
9
Pegasus Airlines
Singapore Airlines
8
Singapore Airlines
Royal Jordanian
8
Royal Jordanian
EgyptAir
8
EgyptAir

How many flights are there each day from Istanbul to Sofia?

Data is based on the number of flights from Istanbul to Sofia for each day of the week on Trip.com over the last month.

Based on Trip.com data from the past month, the most flights from Istanbul to Sofia depart on Friday, and the fewest flights depart on Monday/Tuesday/Wednesday/Thursday.

55
48
40
33
Highest
40
Mon
40
Tue
40
Wed
40
Thu
55
Fri
50
Sat
52
Sun