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

Return flights

29 Sep - 06 Oct	Lufthansa
23 Sep - 30 Sep	Vueling Airlines
20 Sep - 24 Sep	Vueling Airlines
06 Sep - 16 Sep	Vueling Airlines
04 Sep - 15 Sep	Lufthansa
05 Sep - 07 Sep	Brussels Airlines
05 Sep - 09 Sep	Brussels Airlines
03 Sep - 08 Sep	Vueling Airlines
02 Sep - 06 Sep	Vueling Airlines

Also check the deals for one-way flights from London to Monastir 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 Monastir in September from 171€

Return flights