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

One-Way flights

17 Sep	Air Transat
15 Sep	FrenchBee
28 Sep	FrenchBee
10 Sep	Air Transat
09 Sep	Porter Airlines (Canada) Ltd
23 Sep	Porter Airlines (Canada) Ltd
27 Sep	Porter Airlines (Canada) Ltd
13 Sep	Porter Airlines (Canada) Ltd
11 Sep	Air Transat
08 Sep	FrenchBee

Also check the deals for return 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 one-way flights from Montreal to Istanbul in September from 271€

One-Way flights