AirHint found the following cheapest one-way flights from Ontario (ONT) to Buenos Aires (EZE) in January 2026 (see full year).
One-Way flights
| 31 Jan | Frontier Airlines | ||
| 01 Jan | Volaris | ||
| 24 Jan | Avianca | ||
| 25 Jan | Avianca | ||
| 18 Jan | Avianca | ||
| 14 Jan | Volaris | ||
| 06 Jan | Volaris | ||
| 22 Jan | Avianca | ||
| 29 Jan | Copa | ||
| 09 Jan | Copa |
Also check the deals for return flights from Ontario to Buenos Aires in January.
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