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

Return flights

11 Sep - 18 Sep	Lufthansa
07 Sep - 17 Sep	Lufthansa
17 Sep - 24 Sep	Lufthansa
06 Sep - 17 Sep	Lufthansa
16 Sep - 23 Sep	Lufthansa
15 Sep - 23 Sep	Lufthansa
06 Sep - 11 Sep	Lufthansa
15 Sep - 22 Sep	Lufthansa
13 Sep - 04 Oct	Lufthansa
24 Sep - 04 Oct	Lufthansa
14 Sep - 21 Sep	Air Transat	direct
15 Sep - 22 Sep	Air Transat	direct
30 Sep - 08 Oct	Lufthansa
24 Sep - 01 Oct	Austrian Airlines
24 Sep - 20 Oct	Lufthansa
18 Sep - 05 Oct	Lufthansa
25 Sep - 07 Oct	Lufthansa
18 Sep - 16 Oct	Lufthansa
22 Sep - 08 Oct	Lufthansa
23 Sep - 05 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 300€

Return flights