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

Return flights

24 Sep - 02 Oct	TAP
05 Sep - 11 Sep	TAP
05 Sep - 10 Sep	TAP
05 Sep - 13 Sep	Air Transat	direct
06 Sep - 20 Sep	Air Transat	direct
08 Sep - 30 Sep	Air Transat	direct
24 Sep - 02 Oct	Air Transat	direct
15 Sep - 30 Sep	Air Transat
08 Sep - 14 Sep	Air Transat
08 Sep - 17 Sep	Air Transat
15 Sep - 27 Sep	Air Transat
03 Sep - 13 Sep	Air Transat	direct

Also check the deals for one-way flights from Rome 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 Rome to Montreal in September from $427

Return flights