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

Return flights

08 Dec - 12 Dec	Allegiant Air
05 Dec - 12 Dec	Allegiant Air
12 Dec - 15 Dec	Allegiant Air
15 Dec - 22 Dec	Allegiant Air
15 Dec - 28 Dec	Allegiant Air
05 Dec - 07 Dec	Allegiant Air
22 Dec - 29 Dec	Allegiant Air
08 Dec - 11 Dec	Breeze Airways
19 Dec - 25 Dec	Allegiant Air
11 Dec - 18 Dec	Breeze Airways
24 Dec - 01 Jan	Allegiant Air
29 Dec - 02 Jan	Allegiant Air
30 Dec - 08 Jan	Breeze Airways
19 Dec - 02 Jan	Allegiant Air
26 Dec - 01 Jan	Allegiant Air
26 Dec - 02 Jan	Allegiant Air
30 Dec - 01 Jan	Breeze Airways
26 Dec - 04 Jan	Allegiant Air
25 Dec - 03 Jan	Breeze Airways
28 Dec - 01 Jan	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 $319

Return flights