AirHint found the following cheapest return flights from Mexico City (MEX) to Buenos Aires (AEP) in December 2026 (see full year).

Return flights

04 Dec - 11 Dec	Avianca
01 Dec - 07 Dec	Avianca
01 Dec - 05 Dec	Avianca
01 Dec - 10 Dec	LATAM Airlines Group
01 Dec - 12 Dec	LATAM Airlines Group
01 Dec - 11 Dec	LATAM Airlines Group
10 Dec - 11 Dec	LATAM Airlines Group
07 Dec - 21 Dec	Avianca
07 Dec - 16 Dec	Avianca
07 Dec - 05 Jan	Avianca
25 Dec - 05 Jan	Avianca
19 Dec - 27 Dec	Avianca
19 Dec - 01 Jan	Avianca
31 Dec - 03 Jan	Avianca
29 Dec - 05 Jan	Avianca
19 Dec - 08 Jan	Avianca
19 Dec - 09 Jan	Avianca
19 Dec - 02 Jan	Avianca
18 Dec - 02 Jan	Avianca
19 Dec - 04 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.

Book a cheap hotel in Buenos Aires

Cheap car rent in Buenos Aires

Cheapest return flights from Mexico City to Buenos Aires in December from $890

Return flights