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

Return flights

11 Mar - 16 Mar	Avianca
12 Mar - 16 Mar	Avianca
19 Mar - 28 Mar	LATAM Airlines Group
18 Mar - 31 Mar	Arajet
12 Mar - 26 Mar	Avianca
16 Mar - 23 Mar	Avianca
18 Mar - 24 Mar	Arajet
15 Mar - 22 Mar	Arajet
19 Mar - 30 Mar	LATAM Airlines Group
05 Mar - 09 Mar	Arajet
24 Mar - 12 Apr	LATAM Airlines Group
27 Mar - 13 Apr	LATAM Airlines Group
28 Mar - 08 Apr	LATAM Airlines Group
31 Mar - 09 Apr	LATAM Airlines Group
30 Mar - 07 Apr	LATAM Airlines Group
29 Mar - 11 Apr	LATAM Airlines Group

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

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 March from $666

Return flights