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

Return flights

12 Aug - 15 Sep	British Airways
26 Aug - 15 Sep	British Airways
12 Aug - 10 Sep	Qatar Airways
12 Aug - 16 Sep	Qatar Airways
26 Aug - 16 Sep	Qatar Airways
12 Aug - 08 Sep	Qatar Airways
19 Aug - 10 Sep	Qatar Airways
20 Aug - 23 Sep	Qatar Airways
22 Aug - 25 Aug	British Airways
27 Aug - 17 Sep	Qatar Airways
06 Aug - 09 Sep	jetBlue
21 Aug - 24 Aug	British Airways
22 Aug - 24 Aug	British Airways
23 Aug - 26 Aug	Alaska Airlines
05 Aug - 12 Aug	jetBlue
20 Aug - 23 Aug	Delta
18 Aug - 21 Aug	Delta
19 Aug - 22 Aug	Delta
23 Aug - 25 Aug	Alaska Airlines
24 Aug - 27 Aug	Delta

Also check the deals for one-way flights from Ontario 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 return flights from Ontario to Istanbul in August from $950

Return flights