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

Return flights

15 Sep - 29 Sep	Air Transat	direct
09 Sep - 22 Sep	Lufthansa
08 Sep - 22 Sep	Lufthansa
13 Sep - 21 Sep	SWISS
04 Sep - 09 Sep	Lufthansa
20 Sep - 28 Sep	Lufthansa
20 Sep - 29 Sep	Lufthansa
22 Sep - 29 Sep	Lufthansa
02 Sep - 09 Sep	Lufthansa
02 Sep - 11 Sep	Lufthansa
19 Sep - 05 Oct	Air Transat	direct
22 Sep - 13 Oct	Air Transat	direct
22 Sep - 05 Oct	Air Transat	direct
22 Sep - 03 Oct	Air Transat	direct
19 Sep - 03 Oct	Air Transat	direct
20 Sep - 04 Oct	Lufthansa
27 Sep - 12 Oct	Lufthansa
10 Sep - 01 Oct	Lufthansa
22 Sep - 06 Oct	Lufthansa
22 Sep - 07 Oct	Air Transat

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 326€

Return flights