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

Return flights

01 Sep - 03 Sep	Spirit Airlines
01 Sep - 02 Sep	Spirit Airlines
23 Sep - 30 Sep	United	direct
06 Sep - 16 Oct	United	direct
26 Sep - 09 Oct	Delta	direct
19 Sep - 22 Sep	Delta
16 Sep - 21 Sep	Delta	direct
06 Sep - 11 Sep	jetBlue	direct
01 Sep - 01 Sep	Spirit Airlines
26 Sep - 03 Oct	United	direct
23 Sep - 27 Sep	United	direct
24 Sep - 27 Sep	United
24 Sep - 27 Sep	Delta	direct

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

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 September from 197€

Return flights