AirHint found the following cheapest return flights from Denver (DEN) to Keflavik (KEF) in June 2026 (see full year).
Return flights
| 29 Jun - 06 Jul | Icelandair | direct | |
| 30 Jun - 07 Jul | Icelandair | direct | |
| 07 Jun - 27 Jun | Icelandair | direct |
Also check the deals for one-way flights from Denver to Keflavik in June.
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