Cheapest return flights from Denver to Keflavik in June from $549

Best time to book flights for Denver (DEN) to Keflavik (KEF) flights at AirHint

AirHint found the following cheapest return flights from Denver (DEN) to Keflavik (KEF) in June 2025 (see full year).

Return flights

03 Jun - 10 Jun Frontier Airlines
05 Jun - 16 Jun Icelandair direct
02 Jun - 06 Jun Icelandair direct
05 Jun - 15 Jun Icelandair direct
29 Jun - 13 Jul Icelandair direct
13 Jun - 20 Jun Icelandair direct
06 Jun - 15 Jun Icelandair direct
15 Jun - 22 Jun Icelandair direct
14 Jun - 22 Jun Icelandair direct
04 Jun - 19 Jun Frontier Airlines
18 Jun - 30 Jun Icelandair direct
25 Jun - 07 Jul Icelandair direct

Also check the deals for one-way flights from Denver to Keflavik in June.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in Keflavik

Cheap car rent in Keflavik