Cheapest return flights from Phoenix to San Jose in December from 321€

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
02 Dec - 09 Dec United
01 Dec - 16 Dec Frontier Airlines
01 Dec - 10 Dec Southwest Airlines
24 Dec - 30 Dec Frontier Airlines
24 Dec - 31 Dec Frontier Airlines
23 Dec - 30 Dec Frontier Airlines
23 Dec - 31 Dec Frontier Airlines
12 Dec - 02 Jan Frontier Airlines
28 Dec - 04 Jan Frontier Airlines
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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