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

Return flights

21 Jan - 28 Jan	United
27 Jan - 03 Feb	United
03 Jan - 10 Jan	Frontier Airlines	direct
13 Jan - 20 Jan	United
12 Jan - 16 Jan	United
20 Jan - 27 Jan	United
18 Jan - 23 Jan	United
11 Jan - 14 Jan	United
03 Jan - 07 Feb	Frontier Airlines
28 Jan - 04 Feb	United
24 Jan - 31 Jan	Southwest Airlines
24 Jan - 27 Jan	United
27 Jan - 02 Feb	United
03 Jan - 08 Jan	Frontier Airlines
31 Jan - 04 Feb	Southwest Airlines
26 Jan - 07 Feb	Spirit Airlines
24 Jan - 07 Feb	Spirit Airlines
23 Jan - 07 Feb	Spirit Airlines
26 Jan - 01 Feb	Frontier Airlines
30 Jan - 04 Feb	Frontier Airlines

Also check the deals for one-way flights from New York to San Juan in January.

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 January from 139€

Return flights