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

Return flights

22 Sep - 29 Sep	FrenchBee
29 Sep - 06 Oct	FrenchBee
15 Sep - 22 Sep	Air Transat
18 Sep - 25 Sep	Air Transat
17 Sep - 24 Sep	Air Transat
01 Sep - 22 Sep	Air Transat
06 Sep - 13 Sep	Air Transat
14 Sep - 21 Sep	Air Transat
03 Sep - 22 Sep	FrenchBee
08 Sep - 15 Sep	FrenchBee
01 Sep - 08 Sep	FrenchBee
27 Sep - 04 Oct	Air Transat
24 Sep - 01 Oct	Air Transat
25 Sep - 02 Oct	Air Transat
23 Sep - 07 Oct	Air Transat
21 Sep - 05 Oct	Air Transat
26 Sep - 03 Oct	Brussels Airlines
27 Sep - 04 Oct	SWISS	direct
28 Sep - 05 Oct	SWISS	direct
21 Sep - 05 Oct	SWISS	direct

Also check the deals for one-way flights from Montreal 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 Montreal to Geneva in September from $570

Return flights