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

Return flights

01 Dec - 08 Dec	LATAM Airlines Group
04 Dec - 10 Dec	Avianca
02 Dec - 10 Dec	Avianca
03 Dec - 16 Dec	LATAM Airlines Group
01 Dec - 16 Dec	LATAM Airlines Group
06 Dec - 14 Dec	LATAM Airlines Group
01 Dec - 15 Dec	LATAM Airlines Group
01 Dec - 10 Dec	LATAM Airlines Group
03 Dec - 11 Dec	LATAM Airlines Group
10 Dec - 18 Dec	Avianca
16 Dec - 16 Jan	Avianca
23 Dec - 22 Jan	Avianca
10 Dec - 15 Jan	Avianca
07 Dec - 07 Jan	Avianca
25 Dec - 15 Jan	Avianca
30 Dec - 07 Jan	Avianca
31 Dec - 07 Jan	Avianca
18 Dec - 02 Jan	Avianca
25 Dec - 07 Jan	Avianca
14 Dec - 31 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 548€

Return flights