Cheapest one-way flights from Boston to San Juan in May from $93

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

One-Way flights

13 May Spirit Airlines
05 May Spirit Airlines
12 May Spirit Airlines
01 May Frontier Airlines
06 May Spirit Airlines
08 May Frontier Airlines
11 May Frontier Airlines
11 May jetBlue direct
31 May jetBlue direct
08 May jetBlue direct

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

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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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