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

Return flights

31 Dec - 07 Jan	Allegiant Air
31 Dec - 04 Jan	Allegiant Air
27 Dec - 30 Dec	Allegiant Air
27 Dec - 31 Dec	Allegiant Air
27 Dec - 29 Dec	Allegiant Air
30 Dec - 31 Dec	Breeze Airways
27 Dec - 01 Jan	Allegiant Air
29 Dec - 02 Jan	Allegiant Air
30 Dec - 01 Jan	Breeze Airways
30 Dec - 08 Jan	Breeze Airways
29 Dec - 01 Jan	Breeze Airways
29 Dec - 04 Jan	Allegiant Air
29 Dec - 05 Jan	Allegiant Air
28 Dec - 29 Dec	Breeze Airways
28 Dec - 01 Jan	Breeze Airways
28 Dec - 31 Dec	Breeze Airways

Also check the deals for one-way flights from Newburgh 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 Newburgh to San Juan in December from 455€

Return flights