AirHint found the following cheapest return flights from New York (NYC) to San Jose (SJO) in September 2025 (see full year).

Return flights

05 Sep - 10 Sep	United	direct
07 Sep - 26 Sep	United	direct
06 Sep - 20 Sep	United	direct
07 Sep - 21 Sep	United	direct
24 Sep - 28 Sep	United	direct
17 Sep - 22 Sep	United	direct
10 Sep - 17 Sep	United	direct
19 Sep - 03 Oct	United	direct
26 Sep - 10 Oct	United	direct
17 Sep - 01 Oct	United	direct
04 Sep - 18 Sep	United
18 Sep - 24 Sep	United
18 Sep - 02 Oct	United
06 Sep - 14 Sep	Avianca
24 Sep - 08 Oct	United
30 Sep - 14 Oct	United
20 Sep - 04 Oct	United
23 Sep - 07 Oct	United
22 Sep - 01 Oct	Avianca
30 Sep - 01 Oct	Spirit Airlines

Also check the deals for one-way flights from New York to San Jose 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 Jose in September from $263

Return flights