AirHint found the following cheapest return flights from Porto (OPO) to San Juan (SJU) in December 2025 (see full year).
Return flights
| 08 Dec - 14 Dec | Ryanair | ||
| 22 Dec - 01 Jan | Vueling Airlines | ||
| 25 Dec - 03 Jan | Vueling Airlines | ||
| 25 Dec - 04 Jan | Air Europa |
Also check the deals for one-way flights from Porto to San Juan in December.
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