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

Return flights

31 Dec - 21 Jan	WestJet
31 Dec - 23 Jan	WestJet
31 Dec - 19 Jan	WestJet
31 Dec - 25 Jan	WestJet
30 Dec - 19 Jan	Porter Airlines (Canada) Ltd
29 Dec - 27 Jan	TAP
31 Dec - 17 Jan	WestJet
29 Dec - 19 Jan	TAP
28 Dec - 19 Jan	TAP
28 Dec - 21 Jan	TAP
28 Dec - 31 Dec	TAP
24 Dec - 29 Dec	WestJet
24 Dec - 31 Dec	Porter Airlines (Canada) Ltd
23 Dec - 27 Dec	Turkish Airlines
22 Dec - 29 Dec	WestJet
22 Dec - 31 Dec	LOT

Also check the deals for one-way flights from Toronto to Tehran 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 Tehran in December from 854€

Return flights