Cheapest one-way flights from Boston to San Juan in September from 135€

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

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

One-Way flights

01 Sep Delta direct
02 Sep Delta direct
13 Sep Delta direct
14 Sep Delta direct
15 Sep Delta direct
16 Sep Delta direct
17 Sep Delta direct
18 Sep Delta direct
19 Sep Delta direct
20 Sep Delta direct

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