Cheapest one-way flights from San Juan to Boston in December from $58

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

One-Way flights

25 Dec Frontier Airlines direct
31 Dec Spirit Airlines direct
24 Dec Spirit Airlines
24 Dec Spirit Airlines direct
27 Dec Spirit Airlines direct
29 Dec Spirit Airlines direct

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

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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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