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

Return flights

10 Jan - 13 Jan	Southwest Airlines	direct
16 Jan - 25 Jan	Frontier Airlines
16 Jan - 25 Jan	Frontier Airlines	direct
15 Jan - 19 Jan	Frontier Airlines
30 Jan - 01 Feb	Frontier Airlines
16 Jan - 19 Jan	Frontier Airlines
16 Jan - 19 Jan	Southwest Airlines	direct
15 Jan - 19 Jan	Southwest Airlines	direct
30 Jan - 01 Feb	Southwest Airlines	direct

Also check the deals for one-way flights from Phoenix to San Antonio 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 Antonio in January from 137€

Return flights