AirHint found the following cheapest return flights from Austin (AUS) to San Jose (SJO) in December 2025 (see full year).
Return flights
| 28 Dec - 01 Jan | United | ||
| 28 Dec - 13 Jan | Spirit Airlines | ||
| 28 Dec - 10 Jan | Spirit Airlines | ||
| 30 Dec - 06 Jan | United | ||
| 28 Dec - 31 Dec | Spirit Airlines | ||
| 28 Dec - 06 Jan | Spirit Airlines |
Also check the deals for one-way flights from Austin to San Jose in December.
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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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