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

Return flights

12 Dec - 16 Dec	Viva
01 Dec - 14 Dec	Volaris
08 Dec - 13 Dec	Viva
05 Dec - 13 Dec	Volaris
29 Dec - 12 Jan	Volaris
12 Dec - 18 Dec	Viva
20 Dec - 27 Dec	Viva
22 Dec - 29 Dec	United
23 Dec - 28 Dec	Viva
27 Dec - 28 Dec	Volaris
27 Dec - 05 Jan	Volaris
26 Dec - 04 Jan	Viva
22 Dec - 29 Dec	Air Canada	direct
22 Dec - 05 Jan	Volaris
29 Dec - 12 Jan	Air Canada	direct
30 Dec - 04 Jan	Delta
22 Dec - 05 Jan	Air Canada	direct
30 Dec - 04 Jan	Air Canada	direct
27 Dec - 05 Jan	Air Canada	direct

Also check the deals for one-way flights from Monterrey 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 Monterrey to Toronto in December from $380

Return flights