AirHint found the following cheapest return flights from San Jose (SJO) to Asuncion (ASU) in December 2025 (see full year).
Return flights
| 05 Dec - 10 Dec | Copa | ||
| 01 Dec - 08 Dec | Avianca | ||
| 16 Dec - 20 Dec | Avianca | ||
| 30 Dec - 06 Jan | Avianca | ||
| 25 Dec - 28 Dec | Copa | ||
| 07 Dec - 13 Dec | Copa | ||
| 12 Dec - 11 Jan | Copa |
Also check the deals for one-way flights from San Jose to Asuncion in December.
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