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

Return flights

18 Sep - 25 Sep	AZAL
18 Sep - 30 Sep	AZAL
18 Sep - 21 Sep	AZAL
14 Sep - 18 Sep	Fly Jinnah
11 Sep - 18 Sep	Fly Jinnah
14 Sep - 25 Sep	SalamAir
14 Sep - 21 Sep	SalamAir
21 Sep - 28 Sep	SalamAir
21 Sep - 29 Sep	Etihad Airways
27 Sep - 04 Oct	SalamAir
28 Sep - 05 Oct	SalamAir
11 Sep - 23 Sep	SalamAir
21 Sep - 04 Oct	SalamAir
25 Sep - 02 Oct	Fly Jinnah
30 Sep - 07 Oct	SalamAir
25 Sep - 09 Oct	Fly Jinnah
26 Sep - 03 Oct	Fly Jinnah
29 Sep - 06 Oct	Fly Jinnah
24 Sep - 10 Oct	Fly Jinnah
23 Sep - 02 Oct	Fly Jinnah

Also check the deals for one-way flights from Islamabad to Istanbul 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 Islamabad to Istanbul in September from $363

Return flights