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

Return flights

03 Sep - 19 Sep	Spirit Airlines
21 Sep - 01 Oct	United
06 Sep - 25 Sep	United	direct
09 Sep - 16 Sep	United
12 Sep - 22 Sep	United
01 Sep - 22 Sep	United
21 Sep - 30 Sep	United
03 Sep - 11 Sep	United
03 Sep - 18 Sep	United
12 Sep - 19 Sep	United
12 Sep - 28 Sep	United
30 Sep - 12 Oct	Delta
30 Sep - 07 Oct	Delta
23 Sep - 07 Oct	Delta
22 Sep - 05 Oct	Delta
22 Sep - 05 Oct	United	direct
26 Sep - 12 Oct	Spirit Airlines

Also check the deals for one-way flights from Newark to Sao Paulo 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 Newark to Sao Paulo in September from 496€

Return flights