AirHint found the following cheapest return flights from New York (NYC) to San Juan (SJU) in December 2026 (see full year).

Return flights

07 Dec - 12 Dec	Delta	direct
01 Dec - 10 Dec	United	direct
02 Dec - 09 Dec	Delta	direct
10 Dec - 14 Dec	United	direct
14 Dec - 23 Dec	United	direct
12 Dec - 13 Dec	United	direct
15 Dec - 22 Dec	United	direct
28 Dec - 31 Dec	Delta	direct
18 Dec - 21 Dec	United	direct
24 Dec - 29 Dec	Delta	direct
29 Dec - 05 Jan	United
13 Dec - 05 Jan	United
12 Dec - 05 Jan	United
21 Dec - 01 Jan	Delta	direct
21 Dec - 02 Jan	United
22 Dec - 05 Jan	United
21 Dec - 02 Jan	Delta	direct

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 209€

Return flights