Cheapest return flights from Boston to San Juan in September from $190

AirHint found the following cheapest return flights from Boston (BOS) to San Juan (SJU) in September 2026 (see full year).

Return flights

01 Sep - 03 Sep Spirit Airlines direct
15 Sep - 22 Sep jetBlue direct
11 Sep - 15 Sep jetBlue direct
09 Sep - 25 Sep jetBlue direct
27 Sep - 01 Oct jetBlue direct
25 Sep - 29 Sep jetBlue direct
11 Sep - 14 Sep jetBlue direct
05 Sep - 13 Sep jetBlue direct
14 Sep - 21 Sep jetBlue direct
03 Sep - 07 Sep jetBlue direct
01 Sep - 01 Sep Spirit Airlines

Also check the deals for one-way flights from Boston to San Juan in September.

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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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