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

Return flights

09 Sep - 20 Sep	Avianca
25 Sep - 29 Sep	Avianca
17 Sep - 22 Sep	Avianca
25 Sep - 28 Sep	Avianca
18 Sep - 22 Sep	Avianca
14 Sep - 21 Sep	Avianca
26 Sep - 29 Sep	Avianca
16 Sep - 20 Sep	Avianca
14 Sep - 18 Sep	Avianca
30 Sep - 02 Oct	Avianca
10 Sep - 10 Oct	Avianca
28 Sep - 03 Oct	Avianca
10 Sep - 17 Sep	jetBlue	direct
27 Sep - 01 Oct	jetBlue	direct
30 Sep - 07 Oct	jetBlue	direct
10 Sep - 10 Oct	jetBlue	direct
18 Sep - 19 Oct	jetBlue	direct
07 Sep - 01 Oct	jetBlue	direct
30 Sep - 21 Oct	jetBlue	direct
30 Sep - 03 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 $206

Return flights