AirHint found the following cheapest one-way flights from Chicago (ORD) to Lisbon (LIS) in August 2026 (see full year).
One-Way flights
| 16 Aug | Aer Lingus | ||
| 17 Aug | Aer Lingus | ||
| 19 Aug | Aer Lingus | ||
| 05 Aug | Lufthansa | ||
| 13 Aug | Aer Lingus | ||
| 19 Aug | TAP | direct | |
| 05 Aug | TAP | direct | |
| 21 Aug | TAP | direct | |
| 13 Aug | TAP | direct |
Also check the deals for return flights from Chicago to Lisbon in August.
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