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

Return flights

05 Dec - 12 Dec	TAP
08 Dec - 15 Dec	Azores Airlines
07 Dec - 14 Dec	TAP
10 Dec - 17 Dec	TAP
12 Dec - 19 Dec	TAP
22 Dec - 26 Jan	Azores Airlines
13 Dec - 22 Dec	Azores Airlines
22 Dec - 25 Jan	Azores Airlines
13 Dec - 20 Dec	Azores Airlines
15 Dec - 22 Dec	Azores Airlines
06 Dec - 13 Dec	Azores Airlines
22 Dec - 29 Dec	Azores Airlines
31 Dec - 07 Jan	TAP
29 Dec - 05 Jan	Azores Airlines
27 Dec - 03 Jan	Azores Airlines
26 Dec - 02 Jan	TAP
20 Dec - 12 Jan	Azores Airlines
28 Dec - 04 Jan	TAP
20 Dec - 03 Jan	Azores Airlines
30 Dec - 06 Jan	Brussels Airlines

Also check the deals for one-way flights from Montreal 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 Montreal to Porto in December from $595

Return flights