Cheapest return flights from Mexico City to Buenos Aires in September from $1176

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

02 Sep - 30 Sep LATAM Airlines Group
06 Sep - 13 Sep LATAM Airlines Group
18 Sep - 27 Sep LATAM Airlines Group
14 Sep - 28 Sep LATAM Airlines Group
16 Sep - 29 Sep LATAM Airlines Group
10 Sep - 24 Sep LATAM Airlines Group
10 Sep - 22 Sep LATAM Airlines Group
08 Sep - 19 Sep LATAM Airlines Group
05 Sep - 14 Sep LATAM Airlines Group
13 Sep - 20 Sep LATAM Airlines Group
12 Sep - 12 Oct LATAM Airlines Group

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

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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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