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

Return flights

15 Sep - 28 Sep	Tunisair	direct
15 Sep - 30 Sep	Tunisair	direct
23 Sep - 23 Sep	Tunisair	direct
23 Sep - 28 Sep	Tunisair	direct
22 Sep - 29 Sep	Tunisair	direct
15 Sep - 19 Sep	Tunisair	direct
15 Sep - 18 Sep	Tunisair	direct
29 Sep - 03 Oct	Tunisair	direct
27 Sep - 19 Oct	Tunisair	direct
20 Sep - 12 Oct	Tunisair	direct
19 Sep - 25 Sep	Tunisair	direct
26 Sep - 30 Sep	Tunisair	direct
26 Sep - 28 Sep	Transavia France
08 Sep - 24 Oct	Tunisair
13 Sep - 04 Oct	Tunisair	direct
08 Sep - 24 Oct	Turkish Airlines	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 204€

Return flights