AirHint found the following cheapest return flights from San Jose (SJO) to Buenos Aires (EZE) in September 2026 (see full year).
Return flights
| 11 Sep - 21 Sep | Avianca | ||
| 01 Sep - 10 Sep | Avianca | ||
| 14 Sep - 21 Sep | Avianca | ||
| 11 Sep - 20 Sep | Avianca |
Also check the deals for one-way flights from San Jose to Buenos Aires in September.
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