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

One-Way flights

26 Sep	Porter Airlines (Canada) Ltd
11 Sep	Porter Airlines (Canada) Ltd
22 Sep	Porter Airlines (Canada) Ltd
23 Sep	Porter Airlines (Canada) Ltd
25 Sep	Porter Airlines (Canada) Ltd
27 Sep	Porter Airlines (Canada) Ltd
28 Sep	Porter Airlines (Canada) Ltd
10 Sep	Porter Airlines (Canada) Ltd
24 Sep	Porter Airlines (Canada) Ltd
21 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.

Book a cheap hotel in Istanbul

Cheap car rent in Istanbul

Cheapest one-way flights from Montreal to Istanbul in September from 263€

One-Way flights