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

Return flights

09 Dec - 12 Dec	Aeromexico
03 Dec - 15 Dec	Aeromexico
11 Dec - 22 Dec	Aeromexico
01 Dec - 12 Dec	Aeromexico
14 Dec - 24 Dec	Copa
11 Dec - 20 Dec	Copa
02 Dec - 30 Dec	Viva
23 Dec - 30 Dec	Volaris
22 Dec - 30 Dec	Volaris
18 Dec - 21 Dec	Copa
30 Dec - 05 Jan	Copa
20 Dec - 06 Jan	Viva
21 Dec - 03 Jan	Viva
20 Dec - 04 Jan	Viva
19 Dec - 05 Jan	Viva
19 Dec - 04 Jan	Viva

Also check the deals for one-way flights from Monterrey to Santiago 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 Santiago in December from $585

Return flights