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

Return flights

27 Dec - 11 Jan	jetBlue
26 Dec - 30 Dec	jetBlue	direct
29 Dec - 30 Dec	Frontier Airlines	direct
31 Dec - 06 Jan	Frontier Airlines	direct
27 Dec - 31 Dec	Frontier Airlines	direct
27 Dec - 11 Jan	jetBlue	direct
27 Dec - 01 Jan	jetBlue
26 Dec - 07 Jan	jetBlue
29 Dec - 02 Jan	Frontier Airlines
26 Dec - 06 Jan	jetBlue	direct
29 Dec - 02 Jan	Frontier Airlines	direct
30 Dec - 06 Jan	jetBlue
26 Dec - 07 Jan	jetBlue	direct

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

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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Cheapest return flights from Windsor Locks to San Juan in December from $321

Return flights