AirHint found the following cheapest return flights from Buenos Aires (EZE) to San Jose (SJO) in August 2025 (see full year).

Return flights

25 Aug - 29 Aug	Avianca
23 Aug - 29 Aug	Avianca
21 Aug - 29 Aug	Avianca
17 Aug - 20 Aug	Avianca
29 Aug - 06 Sep	Avianca
30 Aug - 06 Sep	Avianca
30 Aug - 05 Sep	Avianca
30 Aug - 03 Sep	Avianca
27 Aug - 06 Sep	Avianca
16 Aug - 29 Aug	Avianca
18 Aug - 29 Aug	Avianca
28 Aug - 02 Sep	Avianca
17 Aug - 03 Sep	Avianca
18 Aug - 23 Aug	Avianca
18 Aug - 30 Aug	Avianca
18 Aug - 27 Aug	Avianca
19 Aug - 26 Aug	Avianca
29 Aug - 09 Sep	Avianca
28 Aug - 17 Sep	Copa
29 Aug - 17 Sep	Avianca

Also check the deals for one-way flights from Buenos Aires 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 Buenos Aires to San Jose in August from 450€

Return flights