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

Return flights

17 Sep - 21 Sep	Arajet
15 Sep - 20 Sep	Arajet
18 Sep - 21 Sep	Copa
20 Sep - 28 Sep	Copa
21 Sep - 28 Sep	Copa
18 Sep - 23 Sep	Copa
17 Sep - 26 Sep	Copa
25 Sep - 30 Sep	Copa
17 Sep - 24 Sep	Copa
05 Sep - 08 Sep	Copa
25 Sep - 05 Oct	Copa
20 Sep - 14 Oct	Copa
30 Sep - 02 Oct	Copa
30 Sep - 03 Oct	Copa
30 Sep - 04 Oct	Copa
17 Sep - 05 Oct	Copa
29 Sep - 10 Oct	Copa
27 Sep - 11 Oct	Copa
29 Sep - 29 Oct	Copa
29 Sep - 03 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 $455

Return flights