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

Return flights

23 Sep - 29 Sep	Nouvelair	direct
13 Sep - 27 Sep	Nouvelair	direct
11 Sep - 14 Sep	Nouvelair	direct
16 Sep - 05 Oct	Nouvelair	direct
24 Sep - 28 Sep	Transavia France
20 Sep - 30 Sep	Nouvelair
14 Sep - 27 Sep	Nouvelair	direct
23 Sep - 12 Oct	Transavia France
27 Sep - 29 Sep	Transavia France
11 Sep - 15 Sep	Nouvelair
11 Sep - 20 Sep	Nouvelair	direct
22 Sep - 30 Sep	Nouvelair
22 Sep - 03 Oct	Tunisair	direct
23 Sep - 12 Oct	Nouvelair	direct

Also check the deals for one-way flights from Tunis to London 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 London in September from $186

Return flights