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

Return flights

09 Dec - 16 Dec	TAP
03 Dec - 10 Dec	TAP
02 Dec - 09 Dec	TAP
02 Dec - 11 Dec	TAP
02 Dec - 16 Dec	TAP
03 Dec - 24 Dec	TAP
03 Dec - 12 Dec	TAP
04 Dec - 17 Dec	TAP
01 Dec - 24 Dec	TAP
07 Dec - 14 Dec	TAP
09 Dec - 08 Jan	TAP
31 Dec - 21 Jan	British Airways
31 Dec - 26 Jan	British Airways
31 Dec - 14 Jan	British Airways
03 Dec - 08 Jan	TAP
30 Dec - 20 Jan	TAP
31 Dec - 13 Jan	TAP
29 Dec - 26 Jan	TAP
03 Dec - 08 Jan	Air Transat	direct
24 Dec - 17 Jan	Air Transat	direct

Also check the deals for one-way flights from Toronto to Porto 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 Porto in December from 369€

Return flights