AirHint found the following cheapest one-way flights from Istanbul (IST) to Sofia (SOF) in December 2025 (see full year).
One-Way flights
| 04 Dec | Pegasus Airlines | direct | |
| 15 Dec | Pegasus Airlines | direct | |
| 23 Dec | Pegasus Airlines | direct | |
| 14 Dec | SKY express | ||
| 30 Dec | flydubai |
Also check the deals for return flights from Istanbul to Sofia in December.
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.
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