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

Return flights

30 Dec - 13 Jan	British Airways
12 Dec - 19 Jan	British Airways
01 Dec - 27 Dec	Alaska Airlines
11 Dec - 25 Dec	Alaska Airlines
25 Dec - 03 Jan	Alaska Airlines
19 Dec - 26 Dec	Alaska Airlines
19 Dec - 18 Jan	Alaska Airlines
21 Dec - 28 Dec	Alaska Airlines
22 Dec - 05 Jan	Alaska Airlines
21 Dec - 04 Jan	Alaska Airlines
26 Dec - 07 Jan	British Airways
26 Dec - 03 Jan	Qatar Airways
20 Dec - 27 Dec	Qatar Airways

Also check the deals for one-way flights from Ontario to Istanbul in December.

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 December from $769

Return flights