AirHint found the following cheapest return flights from Washington (IAD) to San Juan (SJU) in April 2026 (see full year).
Return flights
| 17 Apr - 20 Apr | Avelo Airlines | ||
| 06 Apr - 11 Apr | Breeze Airways | ||
| 06 Apr - 11 Apr | United | direct | |
| 10 Apr - 18 Apr | Frontier Airlines | ||
| 15 Apr - 19 Apr | United |
Also check the deals for one-way flights from Washington to San Juan in April.
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