AirHint found the following cheapest return flights from Lille (LIL) to Geneva (GVA) in September 2025 (see full year).

Return flights

12 Sep - 15 Sep	easyJet	direct
22 Sep - 29 Sep	Volotea
26 Sep - 03 Oct	easyJet	direct
01 Sep - 12 Sep	easyJet
12 Sep - 14 Sep	easyJet
15 Sep - 22 Sep	easyJet	direct
01 Sep - 12 Sep	easyJet	direct
19 Sep - 26 Sep	Ryanair
05 Sep - 08 Sep	easyJet	direct
19 Sep - 26 Sep	easyJet	direct
09 Sep - 11 Sep	Volotea

Also check the deals for one-way flights from Lille to Geneva 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 Lille to Geneva in September from $111

Return flights