AirHint found the following cheapest one-way flights from Chicago (ORD) to Athens (ATH) in September 2026 (see full year).
One-Way flights
| 21 Sep | Air Serbia | ||
| 09 Sep | Lufthansa | ||
| 04 Sep | Lufthansa | ||
| 21 Sep | United | direct | |
| 28 Sep | United | direct | |
| 14 Sep | United | direct | |
| 22 Sep | Air Canada | ||
| 04 Sep | United | direct | |
| 09 Sep | United | direct |
Also check the deals for return flights from Chicago to Athens in September.
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