AirHint found the following cheapest one-way flights from Chicago (ORD) to Lisbon (LIS) in January 2026 (see full year).
One-Way flights
| 14 Jan | Frontier Airlines | ||
| 29 Jan | Spirit Airlines | ||
| 09 Jan | Frontier Airlines | ||
| 07 Jan | Spirit Airlines | ||
| 07 Jan | TAP | direct | |
| 04 Jan | TAP | direct | |
| 14 Jan | TAP | direct | |
| 01 Jan | Aer Lingus | ||
| 02 Jan | TAP | direct |
Also check the deals for return flights from Chicago to Lisbon in January.
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