Cheapest one-way flights from Phoenix to San Diego in January from $25

AirHint found the following cheapest one-way flights from Phoenix (PHX) to San Diego (SAN) in January 2026 (see full year).

One-Way flights

03 Jan Frontier Airlines direct
14 Jan Alaska Airlines direct
23 Jan Frontier Airlines direct
29 Jan Frontier Airlines direct
27 Jan Alaska Airlines direct
25 Jan Frontier Airlines direct
26 Jan Frontier Airlines direct
28 Jan Alaska Airlines direct
30 Jan Frontier Airlines direct
11 Jan Frontier Airlines direct

Also check the deals for return flights from Phoenix to San Diego in January.

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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