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

Return flights

01 Aug - 09 Aug	PIA
01 Aug - 10 Aug	PIA
01 Aug - 08 Aug	PIA
04 Aug - 28 Aug	PIA
01 Aug - 07 Aug	PIA
26 Aug - 02 Sep	Flynas
04 Aug - 07 Aug	PIA
24 Aug - 31 Aug	Flynas
24 Aug - 26 Aug	Flynas
11 Aug - 31 Aug	Flynas
13 Aug - 17 Aug	PIA
28 Aug - 05 Sep	Flynas
23 Aug - 06 Sep	Flynas
14 Aug - 06 Sep	Flynas
28 Aug - 09 Sep	AZAL
28 Aug - 04 Sep	PIA
13 Aug - 13 Sep	flydubai
31 Aug - 13 Sep	flydubai
26 Aug - 02 Sep	PIA	direct
23 Aug - 06 Sep	Turkish Airlines	direct

Also check the deals for one-way flights from Islamabad to Istanbul in August.

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 August from $397

Return flights