Cheapest one-way flights from Istanbul to Sofia in September from $58
AirHint found the following cheapest one-way flights from Istanbul (IST) to Sofia (SOF) in September 2025 (see full year).
One-Way flights
| 26 Sep | Pegasus Airlines | direct | |
| 28 Sep | SKY express | ||
| 15 Sep | Aegean Airlines |
Also check the deals for return flights from Istanbul to Sofia in September.
The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.
