AirHint found the following cheapest return flights from Ontario (ONT) to Istanbul (SAW) in September 2025 (see full year).

Return flights

01 Sep - 25 Sep	Iberia
10 Sep - 30 Sep	Qatar Airways
30 Sep - 07 Oct	Qatar Airways
30 Sep - 14 Oct	Qatar Airways
18 Sep - 25 Sep	Qatar Airways
09 Sep - 16 Sep	Qatar Airways
04 Sep - 16 Sep	Qatar Airways
16 Sep - 30 Sep	Qatar Airways
02 Sep - 12 Sep	Qatar Airways
18 Sep - 02 Oct	Qatar Airways
30 Sep - 08 Oct	Qatar Airways
30 Sep - 29 Oct	Qatar Airways
16 Sep - 03 Oct	Qatar Airways
23 Sep - 07 Oct	Qatar Airways
01 Sep - 08 Sep	Qatar Airways
30 Sep - 09 Oct	Qatar Airways
28 Sep - 10 Oct	Qatar Airways
04 Sep - 11 Sep	Qatar Airways
02 Sep - 09 Sep	Qatar Airways
30 Sep - 20 Oct	Qatar Airways

Also check the deals for one-way flights from Ontario 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 Ontario to Istanbul in September from $911

Return flights