Cheapest return NYC–SJO flights, September

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

Return flights

05 Sep - 09 Sep Frontier Airlines
18 Sep - 25 Sep Copa
18 Sep - 21 Sep Copa
11 Sep - 14 Sep Avianca
18 Sep - 25 Sep United direct
05 Sep - 10 Sep Copa
25 Sep - 26 Sep Spirit Airlines
13 Sep - 26 Sep Spirit Airlines
19 Sep - 26 Sep Spirit Airlines
12 Sep - 26 Sep Spirit Airlines
25 Sep - 08 Oct Spirit Airlines
19 Sep - 08 Oct Spirit Airlines
28 Sep - 08 Oct Spirit Airlines
18 Sep - 08 Oct Spirit Airlines
28 Sep - 16 Oct Spirit Airlines
28 Sep - 18 Oct Spirit Airlines
17 Sep - 04 Oct Spirit Airlines
25 Sep - 04 Oct Spirit Airlines
25 Sep - 11 Oct Spirit Airlines
19 Sep - 04 Oct Spirit Airlines

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

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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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