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

Return flights

27 Dec - 31 Dec	Lufthansa
16 Dec - 15 Jan	Lufthansa
17 Dec - 15 Jan	Air Canada
20 Dec - 31 Dec	TAP
18 Dec - 16 Jan	Lufthansa
27 Dec - 31 Dec	Air Transat	direct
20 Dec - 09 Jan	Air Transat	direct
25 Dec - 02 Jan	TAP
20 Dec - 31 Dec	Air Transat	direct
18 Dec - 16 Jan	Air Transat	direct
20 Dec - 02 Jan	TAP
02 Dec - 13 Dec	Lufthansa
25 Dec - 02 Jan	Air Transat	direct
26 Dec - 04 Jan	TAP
28 Dec - 02 Jan	TAP
25 Dec - 27 Dec	TAP

Also check the deals for one-way flights from Porto to Toronto 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 Porto to Toronto in December from $425

Return flights