AirHint found the following cheapest return flights from Naples (NAP) to San Jose (SJO) in December 2025 (see full year).
Return flights
| 28 Dec - 07 Jan | Ryanair | ||
| 28 Dec - 12 Jan | KLM | ||
| 26 Dec - 02 Jan | Iberia | ||
| 29 Dec - 05 Jan | Ryanair | ||
| 30 Dec - 03 Jan | Air France | ||
| 28 Dec - 08 Jan | Iberia |
Also check the deals for one-way flights from Naples to San Jose in December.
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