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 - 11 Dec	Avianca
04 Dec - 10 Dec	Avianca
02 Dec - 09 Dec	Avianca
08 Dec - 15 Dec	Avianca
02 Dec - 08 Dec	Avianca
04 Dec - 08 Dec	Avianca
02 Dec - 10 Dec	Avianca
03 Dec - 11 Dec	Avianca
05 Dec - 10 Dec	Avianca
03 Dec - 10 Dec	Avianca
09 Dec - 26 Jan	Avianca
08 Dec - 21 Jan	Volaris
10 Dec - 20 Jan	LATAM Airlines Group
24 Dec - 30 Jan	LATAM Airlines Group
30 Dec - 23 Jan	LATAM Airlines Group
25 Dec - 21 Jan	LATAM Airlines Group
14 Dec - 21 Jan	LATAM Airlines Group
01 Dec - 01 Jan	LATAM Airlines Group
30 Dec - 22 Jan	Avianca
31 Dec - 23 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 514€

Return flights