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

Return flights

02 Dec - 09 Dec	Avianca
02 Dec - 10 Dec	Avianca
01 Dec - 05 Dec	Avianca
03 Dec - 09 Dec	Avianca
01 Dec - 10 Dec	Avianca
03 Dec - 08 Dec	Avianca
05 Dec - 11 Dec	Avianca
02 Dec - 08 Dec	Avianca
02 Dec - 11 Dec	Avianca
05 Dec - 09 Dec	Avianca
15 Dec - 22 Jan	Avianca
14 Dec - 13 Jan	Avianca
30 Dec - 13 Jan	Avianca
30 Dec - 15 Jan	Avianca
15 Dec - 13 Jan	Avianca
23 Dec - 15 Jan	Avianca
06 Dec - 15 Jan	Avianca
14 Dec - 19 Jan	Avianca
29 Dec - 19 Jan	Avianca
20 Dec - 20 Jan	Avianca

Also check the deals for one-way flights from Mexico City 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 Mexico City to Buenos Aires in December from 530€

Return flights