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

Return flights

03 Dec - 10 Dec	Frontier Airlines
05 Dec - 09 Dec	Delta
05 Dec - 10 Dec	Delta
04 Dec - 11 Dec	jetBlue
02 Dec - 10 Dec	Frontier Airlines
02 Dec - 28 Jan	Frontier Airlines
02 Dec - 09 Dec	Frontier Airlines
12 Dec - 15 Dec	Frontier Airlines
11 Dec - 15 Dec	Frontier Airlines
07 Dec - 10 Dec	Frontier Airlines
09 Dec - 16 Dec	Frontier Airlines
31 Dec - 17 Jan	Copa
17 Dec - 01 Jan	Copa
31 Dec - 07 Jan	Copa
29 Dec - 08 Jan	Frontier Airlines
17 Dec - 06 Jan	Copa
29 Dec - 07 Jan	Copa
30 Dec - 06 Jan	Copa
30 Dec - 07 Jan	Copa
28 Dec - 09 Jan	Frontier Airlines

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 213€

Return flights