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

Return flights

12 Sep - 15 Sep	AJet	direct
02 Sep - 25 Sep	AJet	direct
11 Sep - 13 Oct	AJet	direct
14 Sep - 13 Oct	AJet	direct
25 Sep - 28 Sep	AZAL
26 Sep - 12 Oct	AZAL
20 Sep - 28 Sep	AZAL
12 Sep - 20 Sep	AZAL
14 Sep - 14 Oct	AJet
13 Sep - 05 Oct	AJet
06 Sep - 08 Sep	AJet
04 Sep - 07 Sep	AZAL
21 Sep - 27 Sep	AJet
18 Sep - 20 Sep	Pegasus Airlines
26 Sep - 12 Oct	Pegasus Airlines	direct
15 Sep - 30 Sep	AJet	direct
13 Sep - 05 Oct	Pegasus Airlines	direct
14 Sep - 14 Oct	Turkish Airlines	direct

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

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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Cheapest return flights from Istanbul to Tehran in September from 102€

Return flights