AirHint found the following cheapest return flights from Boise (BOI) to San Jose (SJO) in January 2026 (see full year).
Return flights
| 21 Jan - 31 Jan | United | ||
| 20 Jan - 27 Jan | United | ||
| 08 Jan - 15 Jan | United | ||
| 20 Jan - 28 Jan | Hawaiian Airlines |
Also check the deals for one-way flights from Boise to San Jose in January.
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