AirHint found the following cheapest return flights from Gaziantep (GZT) to Istanbul (SAW) in September 2025 (see full year).

Return flights

16 Sep - 21 Sep	AJet	direct
16 Sep - 23 Sep	AJet	direct
16 Sep - 19 Sep	AJet	direct
17 Sep - 17 Sep	AJet	direct
16 Sep - 18 Sep	AJet	direct
29 Sep - 02 Oct	AJet	direct
12 Sep - 15 Sep	AJet	direct
15 Sep - 18 Sep	AJet	direct
18 Sep - 21 Sep	AJet	direct
25 Sep - 29 Sep	Pegasus Airlines	direct
19 Sep - 29 Sep	AJet	direct
23 Sep - 17 Oct	AJet	direct

Also check the deals for one-way flights from Gaziantep 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 Gaziantep to Istanbul in September from 60€

Return flights