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

Return flights

09 Sep - 30 Sep	KLM
14 Sep - 21 Sep	KLM
14 Sep - 24 Sep	KLM
10 Sep - 12 Oct	KLM
10 Sep - 01 Oct	KLM
22 Sep - 08 Oct	Transavia France
05 Sep - 24 Oct	KLM
22 Sep - 29 Sep	KLM
10 Sep - 17 Sep	KLM
05 Sep - 30 Oct	KLM
07 Sep - 29 Oct	Air Canada
12 Sep - 26 Sep	Transavia France
13 Sep - 23 Sep	Air Canada
03 Sep - 29 Oct	Air Canada
09 Sep - 12 Sep	Transavia France
02 Sep - 28 Oct	KLM
05 Sep - 27 Oct	KLM
02 Sep - 29 Oct	KLM
14 Sep - 17 Sep	Transavia France
07 Sep - 10 Sep	Wizz Air UK

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 414€

Return flights