AirHint found the following cheapest one-way flights from Boston (BOS) to San Juan (SJU) in May 2026 (see full year).
One-Way flights
| 24 May | Delta | direct | |
| 02 May | United | ||
| 01 May | United | ||
| 23 May | Delta | ||
| 23 May | Delta | direct |
Also check the deals for return flights from Boston to San Juan in May.
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