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

Return flights

05 Dec - 28 Jan	WestJet
10 Dec - 15 Dec	Air Canada
08 Dec - 28 Jan	WestJet
06 Dec - 26 Jan	Flair Airlines
03 Dec - 26 Jan	WestJet
04 Dec - 26 Jan	WestJet
05 Dec - 26 Jan	WestJet
02 Dec - 26 Jan	WestJet
02 Dec - 09 Dec	TAP
03 Dec - 08 Dec	Icelandair
05 Dec - 13 Jan	WestJet
05 Dec - 27 Jan	WestJet
06 Dec - 08 Dec	Aer Lingus
05 Dec - 29 Jan	WestJet
03 Dec - 10 Dec	WestJet
02 Dec - 10 Dec	Porter Airlines (Canada) Ltd
01 Dec - 07 Dec	Aer Lingus
01 Dec - 10 Dec	TAP
03 Dec - 17 Dec	WestJet
05 Dec - 12 Dec	WestJet

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 540€

Return flights