AirHint found the following cheapest return flights from Chicago (ORD) to Lisbon (LIS) in August 2026 (see full year).
Return flights
| 17 Aug - 24 Aug | Air France | ||
| 16 Aug - 23 Aug | KLM | ||
| 23 Aug - 31 Aug | SWISS | ||
| 04 Aug - 11 Aug | Air Canada | ||
| 01 Aug - 08 Aug | Air Canada | ||
| 16 Aug - 23 Aug | TAP | direct | |
| 01 Aug - 08 Aug | TAP | direct |
Also check the deals for one-way flights from Chicago to Lisbon in August.
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