Cheapest return flights from Boston to San Juan in August from 172€

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

Return flights

31 Aug - 12 Sep Spirit Airlines
31 Aug - 20 Sep Spirit Airlines
31 Aug - 18 Sep Spirit Airlines
31 Aug - 19 Sep Spirit Airlines
31 Aug - 11 Sep Spirit Airlines
31 Aug - 06 Sep Spirit Airlines
31 Aug - 13 Sep Spirit Airlines
23 Aug - 12 Sep Spirit Airlines
23 Aug - 11 Sep Spirit Airlines
23 Aug - 06 Sep Spirit Airlines
25 Aug - 29 Aug Spirit Airlines
24 Aug - 28 Aug Frontier Airlines
18 Aug - 28 Aug Frontier Airlines
23 Aug - 27 Aug Spirit Airlines
25 Aug - 27 Aug Spirit Airlines
24 Aug - 29 Aug Spirit Airlines
23 Aug - 26 Aug Spirit Airlines
26 Aug - 28 Aug Spirit Airlines
25 Aug - 29 Aug jetBlue direct
24 Aug - 27 Aug Spirit 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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