Cheapest return flights from Phoenix to San Francisco in December from $54

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

Return flights

12 Dec - 14 Dec Frontier Airlines direct
12 Dec - 15 Dec Alaska Airlines direct
05 Dec - 07 Dec Alaska Airlines direct
23 Dec - 27 Dec Frontier Airlines direct
06 Dec - 07 Dec Southwest Airlines direct
09 Dec - 12 Dec Southwest Airlines direct
04 Dec - 05 Dec Southwest Airlines direct
13 Dec - 15 Dec United direct
11 Dec - 13 Dec Southwest Airlines direct
12 Dec - 17 Dec Southwest Airlines direct
21 Dec - 01 Jan Frontier Airlines direct
26 Dec - 01 Jan United direct

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

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