Cheapest return flights from Mexico City to Buenos Aires in September from $715

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

08 Sep - 26 Sep LATAM Airlines Group
01 Sep - 30 Sep LATAM Airlines Group
01 Sep - 10 Sep LATAM Airlines Group
22 Sep - 30 Sep LATAM Airlines Group
16 Sep - 30 Sep LATAM Airlines Group
16 Sep - 23 Sep LATAM Airlines Group
22 Sep - 29 Sep LATAM Airlines Group
09 Sep - 23 Sep LATAM Airlines Group
14 Sep - 26 Sep LATAM Airlines Group
28 Sep - 05 Oct LATAM Airlines Group
10 Sep - 24 Sep LATAM Airlines Group
24 Sep - 04 Oct LATAM Airlines Group
24 Sep - 02 Oct LATAM Airlines Group
19 Sep - 05 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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