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

Return flights

08 Dec - 12 Dec	Avianca
03 Dec - 10 Dec	Avianca
12 Dec - 28 Dec	Avianca
05 Dec - 14 Dec	Avianca
03 Dec - 11 Dec	Avianca
03 Dec - 09 Dec	Avianca
04 Dec - 05 Dec	Avianca
13 Dec - 28 Dec	Frontier Airlines
17 Dec - 23 Dec	Avianca
24 Dec - 30 Dec	Avianca
28 Dec - 17 Jan	Avianca
09 Dec - 06 Jan	Avianca
17 Dec - 08 Jan	Avianca
31 Dec - 01 Jan	Avianca
30 Dec - 01 Jan	Copa
29 Dec - 01 Jan	Avianca
19 Dec - 03 Jan	Avianca
31 Dec - 02 Jan	Avianca
31 Dec - 04 Jan	Avianca
31 Dec - 05 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 233€

Return flights