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

Return flights

09 Sep - 16 Sep	Copa
03 Sep - 21 Sep	Avianca
12 Sep - 20 Sep	Avianca
18 Sep - 25 Sep	Avianca
15 Sep - 24 Sep	Copa
16 Sep - 25 Sep	Avianca
17 Sep - 21 Sep	Copa
05 Sep - 14 Sep	Copa
10 Sep - 19 Sep	Avianca

Also check the deals for one-way flights from San Jose 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 San Jose to Sao Paulo in September from 311€

Return flights