AirHint found the following cheapest return flights from Denver (DEN) to Lisbon (LIS) in January 2026 (see full year).
Return flights
| 13 Jan - 20 Jan | Air Canada | ||
| 14 Jan - 20 Jan | Air Canada | ||
| 15 Jan - 20 Jan | Air Canada | ||
| 07 Jan - 14 Jan | British Airways | ||
| 22 Jan - 29 Jan | Air Canada | ||
| 17 Jan - 20 Jan | Turkish Airlines | ||
| 07 Jan - 10 Jan | Icelandair |
Also check the deals for one-way flights from Denver to Lisbon in January.
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