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

Return flights

22 Sep - 24 Sep	Copa
19 Sep - 25 Sep	Copa
23 Sep - 24 Sep	Copa
24 Sep - 26 Sep	Copa
22 Sep - 26 Sep	Copa
10 Sep - 11 Sep	Copa
22 Sep - 25 Sep	Copa
23 Sep - 25 Sep	Copa
22 Sep - 28 Sep	Copa
18 Sep - 18 Sep	Copa
24 Sep - 04 Oct	Copa

Also check the deals for one-way flights from Sao Paulo to Quito 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 Quito in September from $451

Return flights