Cheapest one-way flights from San Juan to Boston in January from $68

AirHint found the following cheapest one-way flights from San Juan (SJU) to Boston (BOS) in January 2026 (see full year).

One-Way flights

16 Jan Spirit Airlines direct
22 Jan Spirit Airlines direct
30 Jan Spirit Airlines direct
15 Jan Spirit Airlines direct
17 Jan Frontier Airlines
14 Jan Spirit Airlines
24 Jan Spirit Airlines
12 Jan Spirit Airlines
10 Jan Frontier Airlines
26 Jan Spirit Airlines

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

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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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