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

Return flights

25 Dec - 31 Dec	Copa
31 Dec - 23 Jan	Avianca
30 Dec - 26 Jan	LATAM Airlines Group
24 Dec - 31 Dec	Copa
25 Dec - 01 Jan	Copa
30 Dec - 23 Jan	LATAM Airlines Group
30 Dec - 25 Jan	Avianca
31 Dec - 25 Jan	Avianca
23 Dec - 30 Dec	Volaris
30 Dec - 22 Jan	Avianca
26 Dec - 31 Dec	Avianca
31 Dec - 21 Jan	Avianca
23 Dec - 31 Jan	Avianca
25 Dec - 21 Jan	Aeromexico
21 Dec - 31 Dec	Avianca
20 Dec - 25 Dec	Avianca
25 Dec - 28 Dec	Copa
20 Dec - 31 Dec	Avianca
26 Dec - 28 Dec	Avianca
20 Dec - 29 Dec	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 606€

Return flights