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

Return flights

01 May - 13 May	Avianca
06 May - 12 May	LATAM Airlines Group
21 May - 01 Jun	Avianca
01 May - 12 May	Avianca
01 May - 09 May	Avianca
01 May - 11 May	Avianca
21 May - 28 May	Avianca
08 May - 15 May	Avianca
16 May - 24 May	Avianca
16 May - 23 May	Avianca
05 May - 15 May	Avianca
28 May - 01 Jun	GOL Linhas Aéreas
22 May - 07 Jun	LATAM Airlines Group
28 May - 11 Jun	Avianca
20 May - 06 Jun	LATAM Airlines Group
25 May - 15 Jun	LATAM Airlines Group
27 May - 01 Jun	Avianca
16 May - 14 Jun	Avianca

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

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 May from 678€

Return flights