AirHint found the following cheapest one-way flights from Ontario (ONT) to Athens (ATH) in September 2026 (see full year).
One-Way flights
| 06 Sep | British Airways | ||
| 05 Sep | British Airways | ||
| 01 Sep | British Airways | ||
| 02 Sep | British Airways | ||
| 04 Sep | British Airways | ||
| 03 Sep | British Airways | ||
| 25 Sep | Iberia | ||
| 12 Sep | Iberia |
Also check the deals for return flights from Ontario to Athens in September.
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