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

Return flights

09 Oct - 31 Oct	AZAL
31 Oct - 03 Nov	AZAL
23 Oct - 30 Oct	AZAL
17 Oct - 25 Oct	AZAL
23 Oct - 25 Oct	AZAL
01 Oct - 01 Nov	AZAL
24 Oct - 03 Nov	AZAL
06 Oct - 16 Oct	AZAL
11 Oct - 16 Oct	AZAL
09 Oct - 16 Oct	AZAL
02 Oct - 16 Oct	AZAL
18 Oct - 24 Oct	AZAL
01 Oct - 09 Oct	AZAL
23 Oct - 03 Nov	AZAL
23 Oct - 03 Nov	Pegasus Airlines	direct
23 Oct - 02 Nov	Pegasus Airlines	direct
24 Oct - 02 Nov	Pegasus Airlines	direct
24 Oct - 03 Nov	Pegasus Airlines	direct
01 Oct - 01 Nov	AJet	direct

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

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 October from 39€

Return flights