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

Return flights

01 Oct - 05 Oct	Frontier Airlines
14 Oct - 17 Oct	Frontier Airlines	direct
20 Oct - 21 Oct	Frontier Airlines	direct
15 Oct - 21 Oct	Frontier Airlines	direct
21 Oct - 21 Oct	United
10 Oct - 10 Oct	United
14 Oct - 28 Oct	United
15 Oct - 29 Oct	United
01 Oct - 15 Oct	United
08 Oct - 18 Oct	United
30 Oct - 03 Nov	United
21 Oct - 04 Nov	United
22 Oct - 05 Nov	United
28 Oct - 11 Nov	United
29 Oct - 12 Nov	United
30 Oct - 13 Nov	United
31 Oct - 14 Nov	United
25 Oct - 01 Nov	Frontier Airlines	direct
30 Oct - 02 Nov	United
30 Oct - 12 Nov	Frontier Airlines	direct

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

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 October from $148

Return flights