AirHint found the following cheapest return flights from New York (JFK) to San Jose (SJO) in December 2025 (see full year).

Return flights

09 Dec - 16 Dec	Avianca
07 Dec - 14 Dec	Avianca
08 Dec - 15 Dec	Avianca
05 Dec - 12 Dec	Frontier Airlines
01 Dec - 08 Dec	Avianca
04 Dec - 06 Dec	Copa
12 Dec - 18 Dec	Avianca
12 Dec - 17 Dec	Avianca
06 Dec - 13 Dec	Avianca
12 Dec - 19 Dec	Frontier Airlines
31 Dec - 07 Jan	Avianca
12 Dec - 12 Jan	Avianca
15 Dec - 07 Jan	Avianca
30 Dec - 07 Jan	Avianca
24 Dec - 07 Jan	Avianca
22 Dec - 11 Jan	Frontier Airlines
30 Dec - 06 Jan	Copa
30 Dec - 03 Jan	Copa
28 Dec - 01 Jan	Avianca
25 Dec - 04 Jan	Avianca

Also check the deals for one-way flights from New York 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 New York to San Jose in December from $247

Return flights