Cheapest one-way flights from Boston to San Juan in December from 93€

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

One-Way flights

03 Dec Spirit Airlines
10 Dec Spirit Airlines
08 Dec Spirit Airlines
05 Dec Spirit Airlines
12 Dec Frontier Airlines
14 Dec Frontier Airlines
15 Dec Frontier Airlines
02 Dec Delta direct
12 Dec Delta direct
15 Dec Delta direct

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

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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