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

Return flights

29 Sep - 04 Oct	Air France
24 Sep - 01 Oct	Transavia France
25 Sep - 02 Oct	Nouvelair
24 Sep - 30 Sep	Air France
25 Sep - 28 Sep	Nouvelair
22 Sep - 26 Sep	Air France
23 Sep - 30 Sep	Nouvelair
26 Sep - 03 Oct	Nouvelair
27 Sep - 04 Oct	Nouvelair
22 Sep - 27 Sep	Nouvelair
20 Sep - 23 Sep	Air France
26 Sep - 30 Sep	Nouvelair
26 Sep - 05 Oct	Transavia France
19 Sep - 26 Sep	Tunisair
20 Sep - 22 Sep	Tunisair
22 Sep - 29 Sep	Nouvelair

Also check the deals for one-way flights from Tunis to Lisbon 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 Lisbon in September from 227€

Return flights