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

Return flights

17 Aug - 24 Aug	Avianca
21 Aug - 27 Aug	Avianca
11 Aug - 20 Aug	Avianca
20 Aug - 27 Aug	Avianca
11 Aug - 15 Aug	Avianca
16 Aug - 20 Aug	Avianca
31 Aug - 25 Sep	Avianca
31 Aug - 17 Sep	Avianca
21 Aug - 24 Aug	Avianca
02 Aug - 10 Aug	Avianca
15 Aug - 22 Aug	Avianca
31 Aug - 08 Sep	Avianca
26 Aug - 09 Sep	Avianca
26 Aug - 08 Sep	Avianca
24 Aug - 03 Sep	Avianca
22 Aug - 25 Aug	Avianca
12 Aug - 02 Sep	Avianca
30 Aug - 04 Sep	Avianca
23 Aug - 02 Sep	Avianca
28 Aug - 01 Sep	Avianca

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

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 August from 224€

Return flights