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

Return flights

03 Sep - 30 Sep	Japan Airlines
03 Sep - 10 Sep	Ethiopian Airlines
06 Sep - 23 Sep	Air France
27 Sep - 04 Oct	Ethiopian Airlines
04 Sep - 24 Sep	Ethiopian Airlines
04 Sep - 26 Sep	Ethiopian Airlines
05 Sep - 27 Sep	Ethiopian Airlines
20 Sep - 04 Oct	Air France
12 Sep - 04 Oct	Air France
12 Sep - 03 Oct	Air France
06 Sep - 27 Sep	Air France
05 Sep - 26 Sep	KLM
05 Sep - 25 Sep	Lufthansa

Also check the deals for one-way flights from Sao Paulo to Singapore 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 Singapore in September from 1038€

Return flights