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

Return flights

09 Dec - 29 Dec	Avianca
07 Dec - 26 Dec	Avianca
01 Dec - 11 Dec	Avianca
01 Dec - 08 Dec	Avianca
01 Dec - 06 Dec	Avianca
27 Dec - 01 Jan	Avianca
03 Dec - 10 Dec	Avianca
10 Dec - 22 Dec	Avianca
22 Dec - 01 Jan	Avianca
26 Dec - 05 Jan	Avianca
25 Dec - 02 Jan	Avianca
23 Dec - 29 Dec	Avianca
06 Dec - 20 Dec	Avianca
02 Dec - 08 Dec	Avianca
28 Dec - 04 Jan	Avianca
28 Dec - 09 Jan	Avianca
25 Dec - 03 Jan	Avianca
18 Dec - 03 Jan	Avianca
17 Dec - 03 Jan	Avianca
18 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 700€

Return flights