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

Return flights

08 Aug - 09 Aug	Avianca
01 Aug - 09 Aug	Avianca
27 Aug - 04 Sep	Avianca
07 Aug - 12 Aug	Copa
28 Aug - 02 Sep	Copa
17 Aug - 22 Aug	Copa
14 Aug - 19 Aug	Copa
07 Aug - 17 Aug	Copa
08 Aug - 17 Aug	Copa
09 Aug - 17 Aug	Copa
10 Aug - 17 Aug	Copa

Also check the deals for one-way flights from Asuncion 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 Asuncion to San Jose in August from $482

Return flights