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

One-Way flights

22 Aug	Porter Airlines (Canada) Ltd
26 Aug	FrenchBee
31 Aug	Air Transat
24 Aug	Porter Airlines (Canada) Ltd
20 Aug	Porter Airlines (Canada) Ltd
17 Aug	Porter Airlines (Canada) Ltd
21 Aug	Porter Airlines (Canada) Ltd
27 Aug	FrenchBee
12 Aug	FrenchBee
06 Aug	FrenchBee

Also check the deals for return flights from Montreal to Istanbul in August.

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 August from $357

One-Way flights