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

Return flights

27 Sep - 10 Oct	Avianca
25 Sep - 31 Oct	Avianca
25 Sep - 03 Oct	Avianca
28 Sep - 03 Oct	Avianca
25 Sep - 04 Oct	Avianca
24 Sep - 04 Oct	Avianca
17 Sep - 02 Oct	Avianca
17 Sep - 23 Sep	Avianca
30 Sep - 09 Oct	Avianca
24 Sep - 09 Oct	Avianca
14 Sep - 30 Sep	Copa
15 Sep - 07 Oct	Avianca
20 Sep - 28 Sep	Avianca
16 Sep - 30 Sep	Avianca
16 Sep - 23 Sep	Avianca
17 Sep - 26 Sep	Avianca
09 Sep - 30 Sep	Avianca
25 Sep - 29 Sep	Avianca
07 Sep - 12 Sep	Avianca
18 Sep - 25 Sep	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 $643

Return flights