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

Return flights

05 Dec - 12 Dec	LATAM Airlines Group
03 Dec - 10 Dec	LATAM Airlines Group
07 Dec - 14 Dec	LATAM Airlines Group
01 Dec - 08 Dec	Copa
04 Dec - 09 Dec	LATAM Airlines Group
02 Dec - 11 Dec	Copa
10 Dec - 14 Dec	Avianca
13 Dec - 17 Dec	Avianca
06 Dec - 15 Dec	Arajet
06 Dec - 11 Dec	Arajet
24 Dec - 06 Jan	Arajet
20 Dec - 20 Jan	Avianca
18 Dec - 08 Jan	Avianca
25 Dec - 18 Jan	Aeromexico	direct
24 Dec - 01 Jan	Arajet
25 Dec - 08 Jan	Avianca
29 Dec - 06 Jan	Avianca
14 Dec - 08 Jan	Viva Aerobus
16 Dec - 06 Jan	Arajet
26 Dec - 12 Jan	Viva Aerobus

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 $710

Return flights