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

Return flights

10 Aug - 11 Sep	Avianca
12 Aug - 19 Aug	Avianca
03 Aug - 16 Aug	Avianca
28 Aug - 02 Sep	Avianca
15 Aug - 26 Aug	LATAM Airlines Group
09 Aug - 10 Sep	LATAM Airlines Group
31 Aug - 10 Sep	LATAM Airlines Group
07 Aug - 23 Aug	Avianca
17 Aug - 01 Sep	Avianca
18 Aug - 01 Sep	Avianca
04 Aug - 31 Aug	Avianca
15 Aug - 28 Aug	Copa
03 Aug - 23 Aug	Avianca
18 Aug - 31 Aug	Avianca
09 Aug - 24 Aug	Avianca
30 Aug - 04 Sep	Avianca
07 Aug - 17 Aug	LATAM Airlines Group
30 Aug - 22 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 383€

Return flights