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

Return flights

24 Sep - 05 Oct	Lufthansa
24 Sep - 07 Oct	Lufthansa
24 Sep - 06 Oct	Lufthansa
24 Sep - 08 Oct	Lufthansa
24 Sep - 29 Sep	Lufthansa
23 Sep - 05 Oct	Lufthansa
23 Sep - 06 Oct	Lufthansa
23 Sep - 30 Sep	Lufthansa
24 Sep - 13 Oct	Lufthansa
23 Sep - 07 Oct	Lufthansa
25 Sep - 15 Oct	Lufthansa
23 Sep - 14 Oct	Lufthansa
23 Sep - 29 Sep	Lufthansa
24 Sep - 30 Sep	SWISS
24 Sep - 28 Sep	Lufthansa
23 Sep - 28 Sep	Austrian Airlines
22 Sep - 28 Sep	Austrian Airlines
26 Sep - 30 Sep	Air Canada
22 Sep - 29 Sep	Austrian Airlines
25 Sep - 28 Sep	SWISS

Also check the deals for one-way flights from Paris to Montreal 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 Paris to Montreal in September from $363

Return flights