AirHint found the following cheapest return flights from Phoenix (PHX) to San Francisco (SFO) in January 2026 (see full year).

Return flights

08 Jan - 13 Jan	Frontier Airlines
07 Jan - 11 Jan	Frontier Airlines
15 Jan - 18 Jan	Frontier Airlines	direct
23 Jan - 31 Jan	Frontier Airlines
15 Jan - 19 Jan	Frontier Airlines	direct
23 Jan - 25 Jan	Hawaiian Airlines	direct
29 Jan - 02 Feb	Alaska Airlines	direct
23 Jan - 31 Jan	Southwest Airlines	direct
07 Jan - 11 Jan	Southwest Airlines	direct
08 Jan - 13 Jan	Southwest Airlines	direct
22 Jan - 24 Jan	United	direct

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

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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Cheapest return flights from Phoenix to San Francisco in January from $87

Return flights