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

Return flights

06 Oct - 14 Oct	Porter Airlines (Canada) Ltd
13 Oct - 20 Oct	Porter Airlines (Canada) Ltd
14 Oct - 21 Oct	Porter Airlines (Canada) Ltd
06 Oct - 13 Oct	Porter Airlines (Canada) Ltd
03 Oct - 10 Oct	Air Transat
12 Oct - 20 Oct	Air Transat
05 Oct - 12 Oct	Air Transat
05 Oct - 19 Oct	Air Transat
08 Oct - 15 Oct	Porter Airlines (Canada) Ltd
12 Oct - 19 Oct	Air Transat
28 Oct - 16 Nov	Air Transat
15 Oct - 05 Nov	Air Canada
26 Oct - 02 Nov	FrenchBee
28 Oct - 04 Nov	Air Canada
14 Oct - 01 Nov	Porter Airlines (Canada) Ltd
25 Oct - 01 Nov	Porter Airlines (Canada) Ltd
29 Oct - 05 Nov	FrenchBee
29 Oct - 02 Nov	FrenchBee
28 Oct - 10 Nov	Air Transat
31 Oct - 07 Nov	Air Canada

Also check the deals for one-way flights from Montreal to Istanbul in October.

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 October from 775CAD

Return flights