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

Return flights

10 Dec - 14 Dec	Avianca
02 Dec - 14 Dec	LATAM Airlines Group
08 Dec - 18 Dec	LATAM Airlines Group
05 Dec - 28 Dec	LATAM Airlines Group
23 Dec - 31 Dec	LATAM Airlines Group
01 Dec - 15 Dec	LATAM Airlines Group
08 Dec - 15 Dec	LATAM Airlines Group
03 Dec - 10 Dec	LATAM Airlines Group
24 Dec - 31 Dec	LATAM Airlines Group
01 Dec - 08 Dec	Avianca
24 Dec - 01 Jan	LATAM Airlines Group
27 Dec - 08 Jan	Avianca
31 Dec - 07 Jan	Arajet
07 Dec - 06 Jan	Arajet
30 Dec - 14 Jan	Avianca
25 Dec - 01 Jan	Avianca
09 Dec - 10 Jan	Viva
31 Dec - 10 Jan	Arajet
23 Dec - 01 Jan	Avianca
29 Dec - 12 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 559€

Return flights