Cheapest one-way flights from San Juan to Boston in September from $98

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

One-Way flights

16 Sep Spirit Airlines
17 Sep Spirit Airlines
09 Sep Spirit Airlines
30 Sep Spirit Airlines
28 Sep American Airlines
28 Sep Delta direct
04 Sep Delta direct
30 Sep Delta direct
15 Sep Spirit Airlines
03 Sep Delta direct

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

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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