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

Return flights

30 Aug - 06 Sep	Avianca
30 Aug - 10 Sep	Avianca
19 Aug - 28 Aug	Copa
26 Aug - 04 Sep	Copa
14 Aug - 17 Aug	Avianca
26 Aug - 30 Aug	Avianca
15 Aug - 27 Aug	Avianca
14 Aug - 23 Aug	Avianca
18 Aug - 25 Aug	Avianca
21 Aug - 30 Aug	Avianca
21 Aug - 31 Aug	Avianca
23 Aug - 30 Aug	Avianca
28 Aug - 31 Aug	Avianca
09 Aug - 21 Sep	LATAM Airlines Group
23 Aug - 13 Sep	Avianca

Also check the deals for one-way flights from San Jose to Buenos Aires 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 San Jose to Buenos Aires in August from $489

Return flights