Cheapest return flights from Istanbul to Sofia in December from $98

AirHint found the following cheapest return flights from Istanbul (IST) to Sofia (SOF) in December 2025 (see full year).

Return flights

13 Dec - 15 Dec Pegasus Airlines direct
06 Dec - 13 Dec Pegasus Airlines direct
04 Dec - 11 Dec Pegasus Airlines direct
06 Dec - 10 Dec Pegasus Airlines direct
20 Dec - 21 Dec Pegasus Airlines direct
07 Dec - 10 Dec Pegasus Airlines direct
05 Dec - 12 Dec Pegasus Airlines direct
04 Dec - 07 Dec Pegasus Airlines direct
04 Dec - 08 Dec Pegasus Airlines direct
19 Dec - 21 Dec Pegasus Airlines direct
20 Dec - 13 Jan Pegasus Airlines direct
23 Dec - 02 Jan Pegasus Airlines direct
27 Dec - 03 Jan Pegasus Airlines direct
31 Dec - 05 Jan Pegasus Airlines direct
30 Dec - 06 Jan Pegasus Airlines direct
31 Dec - 01 Jan Pegasus Airlines direct
28 Dec - 02 Jan Turkish Airlines direct
29 Dec - 02 Jan Turkish Airlines direct
25 Dec - 04 Jan Pegasus Airlines
26 Dec - 09 Jan SKY express

Also check the deals for one-way flights from Istanbul to Sofia in December.

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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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