Cheapest return flights from Boston to San Juan in December from $161

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

Return flights

09 Dec - 19 Dec Spirit Airlines
10 Dec - 24 Dec Spirit Airlines
10 Dec - 22 Dec Spirit Airlines
10 Dec - 19 Dec Spirit Airlines
10 Dec - 20 Dec Spirit Airlines
10 Dec - 25 Dec Spirit Airlines
10 Dec - 15 Dec Spirit Airlines
31 Dec - 14 Jan Spirit Airlines
10 Dec - 23 Dec Spirit Airlines
31 Dec - 13 Jan Spirit Airlines
31 Dec - 21 Jan Spirit Airlines
31 Dec - 09 Jan Spirit Airlines direct
10 Dec - 12 Dec Spirit Airlines
11 Dec - 19 Dec Spirit Airlines
31 Dec - 12 Jan Spirit Airlines direct
31 Dec - 15 Jan Spirit Airlines direct
31 Dec - 17 Jan Spirit Airlines direct
31 Dec - 08 Jan Spirit Airlines direct
31 Dec - 10 Jan Spirit Airlines direct
30 Dec - 14 Jan Spirit Airlines

Also check the deals for one-way flights from Boston to San Juan in December.

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