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

Return flights

23 Sep - 30 Sep	Copa
07 Sep - 22 Sep	Spirit Airlines
07 Sep - 15 Sep	Spirit Airlines
07 Sep - 19 Sep	Spirit Airlines
07 Sep - 12 Sep	Spirit Airlines
29 Sep - 03 Oct	Copa
04 Sep - 07 Sep	Avianca
07 Sep - 08 Sep	Spirit Airlines
06 Sep - 22 Sep	Spirit Airlines
06 Sep - 08 Sep	Spirit Airlines
06 Sep - 15 Sep	Spirit Airlines
26 Sep - 17 Oct	Copa
26 Sep - 17 Oct	jetBlue	direct

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 $292

Return flights