AirHint found the following cheapest return flights from Denver (DEN) to Lisbon (LIS) in June 2026 (see full year).
Return flights
| 02 Jun - 09 Jun | Icelandair | ||
| 15 Jun - 30 Jun | Icelandair | ||
| 02 Jun - 07 Jun | Icelandair | ||
| 12 Jun - 20 Jun | Icelandair | ||
| 05 Jun - 12 Jun | Icelandair |
Also check the deals for one-way flights from Denver to Lisbon in June.
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