Cheapest one-way flights from Boston to San Juan in August from 74€

AirHint found the following cheapest one-way flights from Boston (BOS) to San Juan (SJU) in August 2025 (see full year).

One-Way flights

23 Aug Spirit Airlines
30 Aug Spirit Airlines
31 Aug Spirit Airlines
23 Aug jetBlue direct
26 Aug Spirit Airlines
18 Aug Delta direct
29 Aug Frontier Airlines
24 Aug Frontier Airlines
21 Aug Frontier Airlines
28 Aug Frontier Airlines

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

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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