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 - 09 Dec	Avianca
05 Dec - 11 Dec	Avianca
06 Dec - 11 Dec	Avianca
02 Dec - 09 Dec	Avianca
02 Dec - 08 Dec	Avianca
04 Dec - 11 Dec	Avianca
02 Dec - 11 Dec	Avianca
03 Dec - 08 Dec	Avianca
01 Dec - 11 Dec	Avianca
01 Dec - 08 Dec	Avianca
31 Dec - 29 Jan	Avianca
28 Dec - 25 Jan	LATAM Airlines Group
30 Dec - 23 Jan	LATAM Airlines Group
28 Dec - 23 Jan	LATAM Airlines Group
15 Dec - 22 Jan	LATAM Airlines Group
30 Dec - 22 Jan	LATAM Airlines Group
15 Dec - 27 Jan	Avianca
25 Dec - 13 Jan	LATAM Airlines Group
15 Dec - 21 Jan	LATAM Airlines Group
24 Dec - 20 Jan	LATAM Airlines Group

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 529€

Return flights