AirHint found the following cheapest return flights from Sao Paulo (GRU) to Mexico City (MEX) in September 2025 (see full year).

Return flights

08 Sep - 16 Sep	Arajet
12 Sep - 20 Sep	Arajet
26 Sep - 04 Oct	Arajet
30 Sep - 14 Oct	Avianca
30 Sep - 08 Oct	Avianca
01 Sep - 30 Sep	Avianca
02 Sep - 09 Sep	Avianca
07 Sep - 15 Sep	Avianca
12 Sep - 26 Sep	Avianca
11 Sep - 20 Sep	Avianca
01 Sep - 20 Sep	Avianca
14 Sep - 21 Sep	Avianca
11 Sep - 17 Sep	Avianca
20 Sep - 14 Oct	Avianca
30 Sep - 09 Oct	Avianca
30 Sep - 13 Oct	Avianca
27 Sep - 04 Oct	Copa
20 Sep - 04 Oct	Copa
25 Sep - 04 Oct	Copa

Also check the deals for one-way flights from Sao Paulo 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 Sao Paulo to Mexico City in September from 398€

Return flights