Cheapest one-way flights from Boston to San Juan in January from $44

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 January 2025 (see full year).

One-Way flights

07 Jan Spirit Airlines direct
03 Jan Frontier Airlines direct
22 Jan Frontier Airlines direct
27 Jan Frontier Airlines direct
13 Jan Frontier Airlines direct
26 Jan Frontier Airlines direct
25 Jan Frontier Airlines direct
28 Jan Frontier Airlines direct
05 Jan Spirit Airlines direct
01 Jan Frontier Airlines direct

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

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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