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

Return flights

30 Dec - 23 Jan	Copa
30 Dec - 22 Jan	Copa
30 Dec - 21 Jan	Avianca
29 Dec - 23 Jan	Avianca
28 Dec - 02 Jan	Avianca
29 Dec - 14 Jan	Avianca
26 Dec - 31 Dec	Avianca
31 Dec - 15 Jan	Avianca
30 Dec - 15 Jan	Aeromexico
29 Dec - 12 Jan	Avianca
30 Dec - 06 Jan	LATAM Airlines Group
29 Dec - 30 Dec	Avianca
28 Dec - 30 Dec	Viva
27 Dec - 29 Dec	Viva
26 Dec - 29 Dec	Viva
26 Dec - 28 Dec	Viva
31 Dec - 31 Dec	Aeromexico	direct
26 Dec - 31 Dec	Aeromexico	direct
29 Dec - 30 Dec	Aeromexico	direct

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 $767

Return flights