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

Return flights

29 Jan - 05 Feb	Alaska Airlines
06 Jan - 20 Jan	Avianca
05 Jan - 16 Jan	United	direct
16 Jan - 23 Jan	Southwest Airlines
06 Jan - 17 Jan	United	direct
05 Jan - 12 Jan	United	direct
06 Jan - 20 Jan	United	direct

Also check the deals for one-way flights from San Francisco to San Jose 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 San Francisco to San Jose in January from 438€

Return flights