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

Return flights

09 Dec - 18 Dec	Copa
03 Dec - 12 Dec	Copa
17 Dec - 30 Dec	Copa
17 Dec - 31 Dec	Copa
16 Dec - 01 Jan	Copa
13 Dec - 23 Dec	Copa
18 Dec - 31 Dec	GOL Linhas Aéreas
30 Dec - 07 Jan	GOL Linhas Aéreas
24 Dec - 01 Jan	Copa
25 Dec - 01 Jan	Copa
18 Dec - 24 Jan	Copa
19 Dec - 31 Dec	LATAM Airlines Group
20 Dec - 27 Dec	Avianca
20 Dec - 30 Dec	Avianca
18 Dec - 24 Jan	GOL Linhas Aéreas	direct
18 Dec - 07 Jan	GOL Linhas Aéreas
30 Dec - 08 Jan	Copa
18 Dec - 01 Jan	GOL Linhas Aéreas	direct
20 Dec - 01 Jan	Copa

Also check the deals for one-way flights from Sao Paulo to San Jose in December.

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 December from $365

Return flights