AirHint found the following cheapest return flights from Toronto (YYZ) to Istanbul (IST) in September 2025 (see full year).

Return flights

21 Sep - 24 Sep	WestJet
17 Sep - 11 Oct	Air Transat
21 Sep - 23 Sep	WestJet
08 Sep - 10 Sep	WestJet
17 Sep - 24 Sep	Porter Airlines (Canada) Ltd
18 Sep - 24 Sep	Porter Airlines (Canada) Ltd
21 Sep - 11 Oct	Air Transat
18 Sep - 23 Sep	WestJet
09 Sep - 16 Sep	WestJet
16 Sep - 11 Oct	Air Transat
21 Sep - 25 Sep	WestJet
07 Sep - 15 Sep	Flair Airlines
16 Sep - 23 Sep	WestJet
20 Sep - 11 Oct	Air Transat
15 Sep - 11 Oct	Air Transat
20 Sep - 04 Oct	Icelandair
25 Sep - 04 Oct	Icelandair
23 Sep - 09 Oct	Porter Airlines (Canada) Ltd
30 Sep - 14 Oct	Air Transat
30 Sep - 22 Oct	Air Transat

Also check the deals for one-way flights from Toronto 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 Toronto to Istanbul in September from $603

Return flights