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

Return flights

01 Dec - 05 Dec	Air Transat
05 Dec - 08 Dec	Aer Lingus
01 Dec - 08 Dec	Aer Lingus
01 Dec - 06 Dec	Aer Lingus
01 Dec - 20 Jan	British Airways
06 Dec - 21 Dec	Air Transat	direct
10 Dec - 17 Dec	British Airways
07 Dec - 13 Dec	British Airways
02 Dec - 27 Dec	TAP
06 Dec - 13 Dec	Air Canada
06 Dec - 26 Dec	TAP
28 Dec - 09 Jan	British Airways
24 Dec - 07 Jan	British Airways
26 Dec - 10 Jan	British Airways
16 Dec - 16 Jan	British Airways
15 Dec - 16 Jan	British Airways
24 Dec - 05 Jan	Icelandair
28 Dec - 05 Jan	British Airways
24 Dec - 09 Jan	British Airways
23 Dec - 08 Jan	British Airways

Also check the deals for one-way flights from Toronto 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 Toronto to Istanbul in December from $579

Return flights