Cheapest return flights from Boston to San Juan in August from 360€

Best time to book flights for Boston (BOS) to San Juan (SJU) flights at AirHint

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

Return flights

20 Aug - 24 Aug United
20 Aug - 24 Aug Delta direct
15 Aug - 18 Aug United
08 Aug - 17 Aug Frontier Airlines

Also check the deals for one-way 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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