Cheapest one-way flights from Boston to San Juan in July from 87€

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

One-Way flights

20 Jul Spirit Airlines
13 Jul Spirit Airlines
17 Jul Spirit Airlines direct
31 Jul Spirit Airlines direct
08 Jul Frontier Airlines
18 Jul Spirit Airlines
15 Jul Frontier Airlines
21 Jul Frontier Airlines
22 Jul Frontier Airlines
12 Jul Frontier Airlines

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

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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