AirHint found the following cheapest return flights from Oakland (OAK) to San Juan (SJU) in December 2025 (see full year).
Return flights
| 04 Dec - 07 Dec | Hawaiian Airlines | ||
| 21 Dec - 25 Dec | Volaris | ||
| 19 Dec - 02 Jan | Southwest Airlines | ||
| 20 Dec - 04 Jan | Allegiant Air |
Also check the deals for one-way flights from Oakland to San Juan in December.
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