AirHint found the following cheapest one-way flights from Chicago (ORD) to Lisbon (LIS) in August 2026 (see full year).
One-Way flights
| 19 Aug | Aer Lingus | ||
| 16 Aug | Iberia | ||
| 23 Aug | Aer Lingus | ||
| 04 Aug | Aer Lingus | ||
| 09 Aug | Aer Lingus | ||
| 10 Aug | Aer Lingus | ||
| 11 Aug | Aer Lingus | ||
| 18 Aug | Aer Lingus | ||
| 02 Aug | American Airlines | ||
| 12 Aug | American Airlines |
Also check the deals for return flights from Chicago to Lisbon in August.
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