Cheapest one-way flights from Boston to San Juan in May from 81€

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

One-Way flights

04 May Frontier Airlines
04 May Delta direct
24 May Delta direct
13 May Spirit Airlines
17 May Spirit Airlines
09 May Spirit Airlines
01 May Frontier Airlines
23 May Spirit Airlines
07 May Spirit Airlines
15 May Spirit Airlines

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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