Cheapest return flights from Phoenix to San Diego in December from $50

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

Return flights

23 Dec - 30 Dec Frontier Airlines direct
31 Dec - 01 Jan Frontier Airlines direct
16 Dec - 18 Dec Frontier Airlines direct
13 Dec - 15 Dec Frontier Airlines direct
20 Dec - 24 Dec Frontier Airlines direct
21 Dec - 31 Dec Frontier Airlines direct
24 Dec - 28 Dec Frontier Airlines direct
30 Dec - 03 Jan Frontier Airlines direct
31 Dec - 04 Jan Frontier Airlines direct
16 Dec - 21 Dec Frontier Airlines direct
26 Dec - 06 Jan Frontier Airlines direct
27 Dec - 06 Jan Frontier Airlines direct
06 Dec - 08 Dec Frontier Airlines direct
22 Dec - 29 Dec Frontier Airlines direct
10 Dec - 13 Dec Frontier Airlines direct

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

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