Cheapest return flights from Sofia to Istanbul in September from $92

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

Return flights

26 Sep - 30 Sep Pegasus Airlines direct
24 Sep - 25 Sep Pegasus Airlines direct
23 Sep - 30 Sep Pegasus Airlines direct
26 Sep - 04 Oct Pegasus Airlines direct
24 Sep - 02 Oct Pegasus Airlines direct
18 Sep - 26 Sep Pegasus Airlines direct
24 Sep - 27 Sep Pegasus Airlines direct
24 Sep - 01 Oct Pegasus Airlines direct
23 Sep - 04 Oct Pegasus Airlines direct
23 Sep - 03 Oct Pegasus Airlines direct
26 Sep - 03 Oct Pegasus Airlines direct
23 Sep - 26 Sep Pegasus Airlines direct
22 Sep - 29 Sep Pegasus Airlines direct
23 Sep - 09 Oct Pegasus Airlines direct
24 Sep - 16 Oct Pegasus Airlines direct
22 Sep - 25 Sep Pegasus Airlines direct
25 Sep - 30 Sep Pegasus Airlines direct
22 Sep - 24 Sep Pegasus Airlines direct
27 Sep - 04 Oct Pegasus Airlines direct
30 Sep - 01 Oct Pegasus Airlines direct

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

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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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