AirHint found the following cheapest return flights from Des Moines (DSM) to San Juan (SJU) in December 2025 (see full year).
Return flights
| 04 Dec - 08 Dec | Allegiant Air | ||
| 15 Dec - 21 Dec | Allegiant Air | ||
| 26 Dec - 30 Dec | Allegiant Air |
Also check the deals for one-way flights from Des Moines to San Juan in December.
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