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

Return flights

07 May - 28 May	Arajet
04 May - 20 May	Volaris
16 May - 31 May	Avianca
15 May - 31 May	Avianca
17 May - 31 May	Avianca
12 May - 21 May	Avianca
11 May - 21 May	Avianca
04 May - 27 May	Avianca
21 May - 29 May	Avianca
06 May - 14 May	Avianca
26 May - 02 Jun	Volaris
19 May - 03 Jun	Avianca
25 May - 01 Jun	LATAM Airlines Group
21 May - 05 Jun	LATAM Airlines Group
24 May - 05 Jun	LATAM Airlines Group
29 May - 09 Jun	Aeromexico
30 May - 01 Jun	Avianca
13 May - 13 Jun	Avianca
30 May - 27 Jun	Arajet
29 May - 13 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 $650

Return flights