Cheapest one-way flights from Boston (BOS) to San Juan (SJU), December

Select a price to book. see full year.

Dates, airline, and price
Dates Airline Price
07 Dec Delta
Direct Flight
14 Dec Southwest Airlines
20 Dec Delta
Direct Flight
14 Dec Delta
Direct Flight
21 Dec Delta
Direct Flight
23 Dec Frontier Airlines
18 Dec Frontier Airlines
22 Dec Delta
Direct Flight
23 Dec Delta
Direct Flight
19 Dec jetBlue
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deals for return flights from Boston to San Juan in December.

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Updated Jul 14, 2026.

About these fares

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