Cheapest one-way flights from Boston to San Juan in August from $94

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

One-Way flights

05 Aug Spirit Airlines direct
19 Aug Spirit Airlines direct
11 Aug Spirit Airlines direct
29 Aug Spirit Airlines direct
22 Aug Spirit Airlines direct
12 Aug Spirit Airlines direct
10 Aug Spirit Airlines direct
28 Aug Spirit Airlines direct
03 Aug Spirit Airlines direct
16 Aug Delta direct

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

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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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