Cheapest return flights from Mexico City to Buenos Aires in September from $667

Best time to book flights for Mexico City (MEX) to Buenos Aires (AEP) flights at AirHint

AirHint found the following cheapest return flights from Mexico City (MEX) to Buenos Aires (AEP) in September 2025 (see full year).

Return flights

11 Sep - 23 Sep Arajet
14 Sep - 24 Sep Arajet
23 Sep - 07 Oct Avianca
02 Sep - 26 Sep LATAM Airlines Group
30 Sep - 06 Oct Arajet
05 Sep - 13 Sep LATAM Airlines Group
12 Sep - 28 Sep LATAM Airlines Group
23 Sep - 30 Sep LATAM Airlines Group
05 Sep - 16 Sep LATAM Airlines Group
06 Sep - 16 Sep LATAM Airlines Group
10 Sep - 17 Sep LATAM Airlines Group
05 Sep - 20 Sep LATAM Airlines Group
23 Sep - 18 Oct LATAM Airlines Group
25 Sep - 02 Oct LATAM Airlines Group
24 Sep - 01 Oct LATAM Airlines Group
30 Sep - 14 Oct LATAM Airlines Group
25 Sep - 05 Oct LATAM Airlines Group
11 Sep - 23 Oct LATAM Airlines Group
27 Sep - 10 Oct Volaris

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

Skyscanner

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