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

Return flights

01 Dec - 10 Dec	Avianca
05 Dec - 12 Dec	Aeromexico
01 Dec - 06 Dec	Aeromexico
01 Dec - 08 Dec	Aeromexico
24 Dec - 31 Dec	Copa
22 Dec - 05 Jan	Volaris
10 Dec - 21 Dec	Copa
24 Dec - 03 Jan	Copa
23 Dec - 01 Jan	Copa
18 Dec - 05 Jan	Copa
18 Dec - 03 Jan	Copa
26 Dec - 12 Jan	Copa
18 Dec - 04 Jan	Copa
26 Dec - 02 Jan	Aeromexico
06 Dec - 04 Jan	Aeromexico
20 Dec - 04 Jan	Aeromexico

Also check the deals for one-way flights from Monterrey to Buenos Aires 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 Buenos Aires in December from $671

Return flights