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

Return flights

28 Sep - 02 Oct	Transavia France	direct
21 Sep - 28 Sep	Transavia France	direct
14 Sep - 18 Sep	Transavia France	direct
07 Sep - 11 Sep	Transavia France	direct
18 Sep - 21 Sep	Transavia France	direct
07 Sep - 14 Sep	Transavia France	direct
04 Sep - 07 Sep	Transavia France	direct
01 Sep - 07 Sep	Volotea
08 Sep - 14 Sep	Transavia France
26 Sep - 28 Sep	Air Arabia Maroc
12 Sep - 14 Sep	Transavia France

Also check the deals for one-way flights from Montpellier 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 Montpellier to Lisbon in September from $107

Return flights