Cheapest return flights from Boston to San Juan in December from 185€

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

Return flights

03 Dec - 10 Dec Spirit Airlines
03 Dec - 04 Dec Spirit Airlines
03 Dec - 08 Dec Spirit Airlines
08 Dec - 10 Dec Spirit Airlines
05 Dec - 10 Dec Spirit Airlines
05 Dec - 08 Dec Spirit Airlines
03 Dec - 12 Dec Spirit Airlines
03 Dec - 17 Dec Spirit Airlines
10 Dec - 12 Dec Spirit Airlines
10 Dec - 17 Dec Spirit Airlines
29 Dec - 16 Jan Spirit Airlines
29 Dec - 08 Jan Delta direct
29 Dec - 16 Jan Spirit Airlines direct
29 Dec - 18 Jan Spirit Airlines
29 Dec - 18 Jan Spirit Airlines direct
29 Dec - 09 Jan Spirit Airlines
29 Dec - 10 Jan Spirit Airlines
29 Dec - 19 Jan Spirit Airlines
29 Dec - 10 Jan Spirit Airlines direct
27 Dec - 16 Jan Spirit Airlines

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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