Cheapest return flights from Mexico City to Buenos Aires in September from $741

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

Return flights

30 Sep - 08 Oct Arajet
30 Sep - 20 Oct Arajet
09 Sep - 16 Sep Arajet
30 Sep - 12 Oct Arajet
25 Sep - 29 Sep Avianca
28 Sep - 09 Oct Arajet
30 Sep - 09 Oct Arajet
28 Sep - 05 Oct Arajet
29 Sep - 13 Oct Copa
17 Sep - 23 Sep Avianca
22 Sep - 29 Sep Copa
30 Sep - 10 Oct Copa
29 Sep - 04 Oct Copa
13 Sep - 26 Sep Viva
25 Sep - 01 Oct Avianca
08 Sep - 15 Sep LATAM Airlines Group
21 Sep - 25 Sep Arajet
06 Sep - 27 Sep Avianca
27 Sep - 30 Sep Avianca
26 Sep - 30 Sep Avianca

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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