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

Return flights

13 Sep - 19 Sep	Air Transat
08 Sep - 22 Sep	Air Transat
17 Sep - 22 Sep	FrenchBee
15 Sep - 22 Sep	FrenchBee
17 Sep - 24 Sep	FrenchBee
09 Sep - 12 Sep	Air Transat
24 Sep - 13 Oct	FrenchBee
07 Sep - 21 Sep	Air Transat
22 Sep - 29 Sep	FrenchBee
24 Sep - 10 Oct	FrenchBee
07 Sep - 10 Sep	Air Transat
24 Sep - 29 Sep	FrenchBee
22 Sep - 08 Oct	FrenchBee
22 Sep - 01 Oct	FrenchBee
26 Sep - 03 Oct	FrenchBee
22 Sep - 20 Oct	FrenchBee
17 Sep - 05 Oct	FrenchBee
24 Sep - 03 Oct	FrenchBee
24 Sep - 12 Oct	FrenchBee
24 Sep - 01 Oct	FrenchBee

Also check the deals for one-way flights from Montreal to Istanbul 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 Montreal to Istanbul in September from 515€

Return flights