Cheapest return flights from Boston to San Juan in July from 365€

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

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

Return flights

29 Jul - 10 Aug Frontier Airlines direct
17 Jul - 23 Jul Frontier Airlines
06 Jul - 12 Jul Frontier Airlines
09 Jul - 13 Jul Frontier Airlines
25 Jul - 28 Jul Frontier Airlines
19 Jul - 25 Jul Frontier Airlines
30 Jul - 04 Aug Frontier Airlines

Also check the deals for one-way 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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