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

Return flights

29 Aug - 05 Sep	Avianca
31 Aug - 05 Sep	Avianca
29 Aug - 03 Sep	Avianca
23 Aug - 03 Sep	Avianca
23 Aug - 02 Sep	Avianca
29 Aug - 06 Sep	Avianca
29 Aug - 02 Sep	Avianca
19 Aug - 03 Sep	Copa
26 Aug - 27 Aug	Copa
21 Aug - 26 Aug	Avianca
23 Aug - 27 Aug	Avianca
22 Aug - 27 Aug	Copa
21 Aug - 25 Aug	Copa
31 Aug - 08 Sep	Copa
17 Aug - 24 Aug	jetBlue
20 Aug - 24 Aug	Avianca
23 Aug - 29 Aug	Avianca
22 Aug - 26 Aug	Avianca
22 Aug - 25 Aug	Avianca
30 Aug - 02 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 254€

Return flights