Cheapest one-way flights from Boston to San Juan in May from $117

AirHint found the following cheapest one-way flights from Boston (BOS) to San Juan (SJU) in May 2026 (see full year).

One-Way flights

03 May jetBlue direct
04 May jetBlue direct
02 May jetBlue direct
01 May Delta direct
05 May Delta direct
06 May Delta direct
07 May jetBlue direct
09 May Delta direct
10 May Delta direct
11 May Delta direct

Also check the deals for return flights from Boston to San Juan in May.

Skyscanner

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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