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

Return flights

30 Sep - 08 Oct	Tunisair
18 Sep - 23 Sep	Air France
18 Sep - 24 Sep	Air France
20 Sep - 23 Sep	Air France
18 Sep - 25 Sep	Air France
27 Sep - 08 Oct	Tunisair
18 Sep - 02 Oct	Eurowings
28 Sep - 06 Oct	Tunisair
27 Sep - 06 Oct	Tunisair
22 Sep - 25 Sep	Nouvelair
23 Sep - 08 Oct	Tunisair
26 Sep - 01 Oct	Tunisair	direct
29 Sep - 06 Oct	Air France
20 Sep - 27 Sep	Air France
29 Sep - 04 Oct	Tunisair
22 Sep - 28 Sep	Nouvelair
15 Sep - 22 Sep	Nouvelair
25 Sep - 07 Oct	Tunisair
13 Sep - 27 Sep	Nouvelair
14 Sep - 18 Sep	Tunisair

Also check the deals for one-way flights from Tunis 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 Tunis to Istanbul in September from 198€

Return flights