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

One-Way flights

28 Sep	Nouvelair
25 Sep	Nouvelair
18 Sep	Nouvelair
12 Sep	Vueling Airlines
27 Sep	Transavia France
20 Sep	Transavia France
21 Sep	Nouvelair
26 Sep	Transavia France
26 Sep	Nouvelair	direct
19 Sep	Tunisair

Also check the deals for return 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 one-way flights from Tunis to Istanbul in September from 99€

One-Way flights