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

Return flights

10 Dec - 15 Dec	United
01 Dec - 06 Dec	United
01 Dec - 08 Dec	United
09 Dec - 13 Dec	Delta
13 Dec - 20 Dec	United
28 Dec - 31 Dec	Frontier Airlines
17 Dec - 25 Dec	United
27 Dec - 02 Jan	Frontier Airlines
27 Dec - 01 Jan	Frontier Airlines
17 Dec - 26 Dec	United
30 Dec - 02 Jan	Delta
01 Dec - 07 Dec	Delta
26 Dec - 30 Dec	American Airlines
29 Dec - 02 Jan	United
20 Dec - 08 Jan	United
25 Dec - 01 Jan	United
26 Dec - 02 Jan	Southwest Airlines
19 Dec - 02 Jan	Southwest Airlines
25 Dec - 02 Jan	Delta
23 Dec - 04 Jan	United

Also check the deals for one-way flights from New York 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 New York to San Juan in December from 268€

Return flights