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 - 15 Dec	Copa
09 Dec - 16 Dec	Copa
08 Dec - 11 Dec	Copa
07 Dec - 16 Dec	Copa
11 Dec - 18 Dec	Avianca
10 Dec - 17 Dec	Copa
10 Dec - 12 Dec	Copa
12 Dec - 18 Dec	Copa
07 Dec - 14 Dec	American Airlines
10 Dec - 10 Jan	Copa
13 Dec - 16 Dec	Avianca
31 Dec - 10 Jan	Frontier Airlines
29 Dec - 09 Jan	jetBlue
18 Dec - 15 Jan	Frontier Airlines
18 Dec - 29 Jan	Frontier Airlines
29 Dec - 07 Jan	jetBlue
29 Dec - 12 Jan	Avianca
18 Dec - 26 Jan	Frontier Airlines
27 Dec - 29 Jan	Avianca
11 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 241€

Return flights