AirHint found the following cheapest one-way flights from Chicago (ORD) to Dublin (DUB) in September 2026 (see full year).
One-Way flights
| 07 Sep | Lufthansa | ||
| 22 Sep | Icelandair | ||
| 15 Sep | SWISS | ||
| 11 Sep | Lufthansa | ||
| 22 Sep | United | direct | |
| 07 Sep | United | direct | |
| 15 Sep | United | direct | |
| 11 Sep | Aer Lingus | direct |
Also check the deals for return flights from Chicago to Dublin in September.
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