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

Return flights

09 Sep - 23 Sep	Lufthansa
16 Sep - 22 Sep	Lufthansa
03 Sep - 16 Sep	Lufthansa
15 Sep - 29 Sep	Lufthansa
17 Sep - 24 Sep	Lufthansa
23 Sep - 07 Oct	Lufthansa
22 Sep - 01 Oct	Lufthansa
15 Sep - 30 Sep	Lufthansa
08 Sep - 15 Sep	Lufthansa
20 Sep - 30 Sep	Lufthansa
20 Sep - 04 Oct	Lufthansa
24 Sep - 10 Oct	Lufthansa
08 Sep - 23 Sep	Lufthansa
08 Sep - 14 Sep	Lufthansa
22 Sep - 06 Oct	Lufthansa
22 Sep - 05 Oct	Lufthansa
21 Sep - 05 Oct	Lufthansa
10 Sep - 15 Oct	SWISS
10 Sep - 01 Oct	SWISS
27 Sep - 13 Oct	Lufthansa

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 331€

Return flights