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

Return flights

13 Sep - 16 Sep	GOL Linhas Aéreas	direct
02 Sep - 18 Sep	GOL Linhas Aéreas	direct
15 Sep - 18 Sep	Avianca
06 Sep - 20 Sep	Avianca
24 Sep - 29 Sep	Copa
30 Sep - 06 Oct	Copa
13 Sep - 28 Sep	Copa
05 Sep - 18 Sep	Copa
15 Sep - 26 Sep	Copa
08 Sep - 14 Sep	Copa
22 Sep - 28 Sep	Copa
24 Sep - 02 Oct	Copa
22 Sep - 10 Oct	Copa
30 Sep - 11 Oct	Avianca
23 Sep - 11 Oct	Avianca

Also check the deals for one-way flights from Sao Paulo to San Jose 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 San Jose in September from $350

Return flights