Cheapest return flights from Athens to Istanbul in September from $110

Best time to book flights for Athens (ATH) to Istanbul (IST) flights at AirHint

AirHint found the following cheapest return flights from Athens (ATH) to Istanbul (IST) in September 2025 (see full year).

Return flights

30 Sep - 23 Oct Pegasus Airlines direct
10 Sep - 16 Sep Pegasus Airlines direct
25 Sep - 30 Sep Pegasus Airlines direct
26 Sep - 30 Sep Pegasus Airlines direct
05 Sep - 12 Sep Pegasus Airlines direct
29 Sep - 03 Oct Pegasus Airlines direct
04 Sep - 16 Sep SKY express direct
12 Sep - 16 Sep Pegasus Airlines direct
02 Sep - 16 Sep SKY express direct
07 Sep - 16 Sep SKY express direct
03 Sep - 16 Sep SKY express direct
01 Sep - 16 Sep SKY express direct
22 Sep - 09 Oct SKY express direct
22 Sep - 08 Oct SKY express direct
22 Sep - 04 Oct SKY express direct
22 Sep - 03 Oct SKY express direct
22 Sep - 10 Oct SKY express direct
22 Sep - 07 Oct SKY express direct
22 Sep - 06 Oct SKY express direct
30 Sep - 05 Oct Air Serbia

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

Skyscanner

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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