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

Return flights

23 Sep - 30 Sep	Air France
24 Sep - 01 Oct	KLM
26 Sep - 15 Oct	British Airways
19 Sep - 24 Sep	KLM
25 Sep - 15 Oct	British Airways
19 Sep - 26 Sep	KLM
19 Sep - 28 Sep	KLM
26 Sep - 03 Oct	KLM
30 Sep - 12 Oct	Air Canada
21 Sep - 28 Sep	KLM
18 Sep - 25 Sep	Air Canada
21 Sep - 29 Sep	KLM
21 Sep - 27 Sep	KLM
19 Sep - 10 Oct	KLM
20 Sep - 18 Oct	Lufthansa
30 Sep - 30 Oct	Air Canada
27 Sep - 03 Oct	LOT
28 Sep - 01 Oct	Wizz Air UK
19 Sep - 28 Sep	Turkish Airlines	direct
19 Sep - 26 Sep	Turkish Airlines	direct

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 $531

Return flights