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

Return flights

15 Sep - 25 Sep	Pegasus Airlines
15 Sep - 30 Sep	AJet
15 Sep - 29 Sep	AJet
18 Sep - 27 Sep	Pegasus Airlines
15 Sep - 28 Sep	AJet
18 Sep - 22 Sep	Pegasus Airlines
19 Sep - 28 Sep	AJet
20 Sep - 28 Sep	AJet
15 Sep - 27 Sep	AJet
25 Sep - 29 Sep	Pegasus Airlines
20 Sep - 04 Oct	AJet
20 Sep - 04 Oct	Tunisair	direct
29 Sep - 10 Oct	Pegasus Airlines
29 Sep - 10 Oct	Tunisair	direct
24 Sep - 01 Oct	Tunisair	direct
26 Sep - 02 Oct	Pegasus Airlines
25 Sep - 02 Oct	Transavia France
23 Sep - 07 Oct	Turkish Airlines	direct
27 Sep - 02 Oct	Nouvelair	direct
26 Sep - 02 Oct	Tunisair	direct

Also check the deals for one-way flights from Istanbul to Tunis 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 Tunis in September from 178€

Return flights