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

Return flights

16 Sep - 30 Sep	Flybondi
11 Sep - 21 Sep	GOL Linhas Aéreas
12 Sep - 20 Sep	Flybondi
26 Sep - 12 Oct	Aerolineas Argentinas
30 Sep - 15 Oct	Aerolineas Argentinas
30 Sep - 05 Oct	Aerolineas Argentinas
26 Sep - 28 Sep	Aerolineas Argentinas
11 Sep - 18 Sep	GOL Linhas Aéreas
12 Sep - 19 Sep	GOL Linhas Aéreas
12 Sep - 21 Sep	GOL Linhas Aéreas
10 Sep - 17 Sep	GOL Linhas Aéreas
26 Sep - 29 Sep	Aerolineas Argentinas
03 Sep - 10 Sep	Flybondi
20 Sep - 05 Oct	Flybondi
25 Sep - 01 Oct	Flybondi
29 Sep - 06 Oct	Aerolineas Argentinas
29 Sep - 14 Oct	Avianca
01 Sep - 01 Oct	Avianca
30 Sep - 12 Oct	Avianca
30 Sep - 11 Oct	Avianca

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

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 Buenos Aires to Mexico City in September from $699

Return flights