AirHint found the following cheapest one-way flights from Boston (BOS) to San Juan (SJU) in March 2026 (see full year).
One-Way flights
| 01 Mar | Frontier Airlines | direct | |
| 03 Mar | Spirit Airlines | direct | |
| 04 Mar | Frontier Airlines | ||
| 16 Mar | United | ||
| 06 Mar | Frontier Airlines | ||
| 29 Mar | Frontier Airlines |
Also check the deals for return flights from Boston to San Juan in March.
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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.
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