AirHint found the following cheapest one-way flights from San Jose (SJO) to Buenos Aires (AEP) in September 2025 (see full year).
One-Way flights
| 24 Sep | LATAM Airlines Group | ||
| 29 Sep | LATAM Airlines Group | ||
| 08 Sep | LATAM Airlines Group | ||
| 06 Sep | Avianca | ||
| 16 Sep | Avianca | ||
| 19 Sep | Avianca | ||
| 21 Sep | Avianca |
Also check the deals for return flights from San Jose to Buenos Aires in September.
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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