Cheapest return flights from Newark to San Jose in December from $365

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

Return flights

31 Dec - 17 Jan Frontier Airlines
30 Dec - 09 Jan Frontier Airlines
21 Dec - 24 Dec Spirit Airlines
30 Dec - 08 Jan Frontier Airlines
30 Dec - 21 Jan Frontier Airlines
21 Dec - 31 Dec Spirit Airlines
21 Dec - 23 Dec Spirit Airlines
24 Dec - 31 Dec Spirit Airlines
28 Dec - 19 Jan Spirit Airlines
21 Dec - 28 Dec Spirit Airlines
27 Dec - 19 Jan Spirit Airlines
30 Dec - 06 Jan Frontier Airlines
21 Dec - 29 Dec Spirit Airlines
29 Dec - 21 Jan Spirit Airlines
27 Dec - 07 Jan Spirit Airlines
25 Dec - 01 Jan Spirit Airlines
21 Dec - 23 Dec United direct
24 Dec - 28 Dec United
24 Dec - 29 Dec United
22 Dec - 30 Dec Spirit Airlines

Also check the deals for one-way flights from Newark to San Jose in December.

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