Cheapest return flights from Phoenix to San Jose in December from $390

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

Return flights

13 Dec - 23 Dec United
29 Dec - 09 Jan Frontier Airlines
30 Dec - 07 Jan Frontier Airlines
22 Dec - 09 Jan jetBlue
15 Dec - 31 Dec American Airlines
30 Dec - 02 Jan United
28 Dec - 03 Jan American Airlines
30 Dec - 03 Jan American Airlines
27 Dec - 31 Dec Frontier Airlines
23 Dec - 03 Jan American Airlines
24 Dec - 04 Jan Aeromexico
26 Dec - 03 Jan Frontier Airlines

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

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