AirHint found the following cheapest one-way flights from Washington (DCA) to San Juan (SJU) in January 2026 (see full year).
One-Way flights
| 12 Jan | Delta | ||
| 31 Jan | United | ||
| 22 Jan | Delta | ||
| 04 Jan | Delta | ||
| 02 Jan | United | ||
| 21 Jan | Delta | ||
| 08 Jan | United | ||
| 09 Jan | United | ||
| 19 Jan | Delta | ||
| 01 Jan | Delta |
Also check the deals for return flights from Washington to San Juan in January.
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