Cheapest return flights from Istanbul to Sofia in September from 90€

AirHint found the following cheapest return flights from Istanbul (IST) to Sofia (SOF) in September 2026 (see full year).

Return flights

15 Sep - 22 Sep Pegasus Airlines direct
19 Sep - 26 Sep Pegasus Airlines direct
06 Sep - 13 Sep Pegasus Airlines direct
26 Sep - 28 Sep Pegasus Airlines
20 Sep - 22 Sep Pegasus Airlines
19 Sep - 21 Sep Air Serbia
12 Sep - 14 Sep Air Serbia
19 Sep - 21 Sep Turkish Airlines direct
26 Sep - 28 Sep Turkish Airlines direct
12 Sep - 14 Sep Turkish Airlines direct

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

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