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

Return flights

17 Sep - 21 Sep	Transavia France
01 Sep - 24 Sep	Air Canada
14 Sep - 28 Sep	Air Canada
03 Sep - 26 Sep	Air Canada
28 Sep - 10 Oct	Air Canada
12 Sep - 26 Sep	Air Canada
01 Sep - 28 Sep	Air Canada
01 Sep - 30 Sep	Air Canada
05 Sep - 26 Sep	Air Canada
10 Sep - 12 Sep	Transavia France
14 Sep - 28 Sep	Turkish Airlines	direct
12 Sep - 10 Oct	Transavia France

Also check the deals for one-way flights from Istanbul 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 Istanbul to Montreal in September from $568

Return flights