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

Return flights

31 Dec - 07 Jan	Frontier Airlines
29 Dec - 31 Dec	Avianca
31 Dec - 09 Jan	Frontier Airlines
30 Dec - 06 Jan	jetBlue
29 Dec - 07 Jan	Frontier Airlines
31 Dec - 05 Jan	Frontier Airlines
31 Dec - 06 Jan	Frontier Airlines
30 Dec - 03 Jan	jetBlue	direct
31 Dec - 09 Jan	jetBlue	direct
30 Dec - 11 Jan	jetBlue	direct
29 Dec - 10 Jan	Frontier Airlines
26 Dec - 31 Dec	Frontier Airlines
25 Dec - 31 Dec	Copa
26 Dec - 30 Dec	American Airlines
25 Dec - 29 Dec	Copa
26 Dec - 28 Dec	American Airlines
26 Dec - 26 Dec	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 $348

Return flights