Cheapest return flights from Boston to San Juan in December from 275€

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

Return flights

03 Dec - 09 Dec Delta direct
23 Dec - 30 Dec Frontier Airlines direct
26 Dec - 07 Jan jetBlue direct
23 Dec - 27 Dec Delta direct
27 Dec - 01 Jan Southwest Airlines
21 Dec - 28 Dec Frontier Airlines direct
31 Dec - 03 Jan Southwest Airlines
23 Dec - 01 Jan Southwest Airlines
22 Dec - 01 Jan Southwest Airlines
27 Dec - 07 Jan Southwest Airlines
19 Dec - 27 Dec Delta direct
30 Dec - 02 Jan Southwest Airlines
30 Dec - 02 Jan Delta direct
22 Dec - 02 Jan Southwest Airlines
31 Dec - 03 Jan Delta direct
26 Dec - 30 Dec Delta

Also check the deals for one-way 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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