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

Return flights

27 Sep - 11 Oct	Air France
29 Sep - 14 Oct	Air France
30 Sep - 14 Oct	Air France
25 Sep - 02 Oct	Air France
10 Sep - 30 Sep	Air France
04 Sep - 16 Sep	Air France
16 Sep - 30 Sep	Air France
20 Sep - 30 Sep	Air France
09 Sep - 20 Sep	Air France
09 Sep - 16 Sep	Air France
23 Sep - 30 Sep	Air France
24 Sep - 30 Sep	Air France
13 Sep - 16 Sep	Air France
16 Sep - 23 Sep	Air France
30 Sep - 04 Oct	Air France
22 Sep - 06 Oct	Air France
30 Sep - 06 Oct	Air France
29 Sep - 13 Oct	Air France
28 Sep - 04 Oct	Air France
01 Sep - 01 Oct	Air France

Also check the deals for one-way flights from London 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 London to Tunis in September from $223

Return flights