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

Return flights

31 Jan - 11 Feb	Volaris
24 Jan - 16 Feb	Avianca
22 Jan - 09 Feb	Arajet
22 Jan - 08 Feb	Copa
31 Jan - 10 Feb	Volaris
26 Jan - 06 Feb	LATAM Airlines Group
26 Jan - 17 Feb	LATAM Airlines Group
28 Jan - 09 Feb	Avianca
25 Jan - 17 Feb	Arajet
27 Jan - 17 Feb	Avianca
23 Jan - 25 Jan	LATAM Airlines Group
21 Jan - 27 Jan	LATAM Airlines Group
22 Jan - 27 Jan	LATAM Airlines Group
21 Jan - 30 Jan	Copa
22 Jan - 28 Jan	LATAM Airlines Group
23 Jan - 30 Jan	Copa
25 Jan - 31 Jan	Copa
24 Jan - 31 Jan	Avianca
27 Jan - 30 Jan	Viva
22 Jan - 30 Jan	Viva

Also check the deals for one-way flights from Mexico City to Buenos Aires in January.

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 January from $779

Return flights