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

Return flights

15 Sep - 26 Sep	FrenchBee
10 Sep - 26 Sep	FrenchBee
03 Sep - 17 Sep	Air Transat
19 Sep - 26 Sep	FrenchBee
12 Sep - 26 Sep	FrenchBee
15 Sep - 22 Sep	FrenchBee
10 Sep - 17 Sep	Air Transat
29 Sep - 06 Oct	FrenchBee
22 Sep - 29 Sep	FrenchBee
12 Sep - 19 Sep	FrenchBee
24 Sep - 01 Oct	FrenchBee
10 Sep - 01 Oct	FrenchBee
19 Sep - 03 Oct	FrenchBee
10 Sep - 24 Sep	FrenchBee
15 Sep - 01 Oct	FrenchBee
29 Sep - 09 Oct	Air Transat
28 Sep - 10 Oct	FrenchBee
26 Sep - 03 Oct	FrenchBee
28 Sep - 05 Oct	FrenchBee
30 Sep - 09 Oct	Air Transat

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 $726

Return flights