Cheapest return flights from Denver to Keflavik in August from $383

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

Return flights

06 Aug - 13 Aug Icelandair direct
24 Aug - 01 Sep Icelandair direct
30 Aug - 04 Sep Icelandair direct
09 Aug - 15 Aug Icelandair direct
16 Aug - 26 Aug Icelandair direct
16 Aug - 25 Aug Icelandair direct
14 Aug - 21 Aug Icelandair direct
22 Aug - 27 Aug Icelandair direct
23 Aug - 27 Aug Icelandair direct
29 Aug - 07 Sep Icelandair direct
10 Aug - 16 Aug Icelandair direct
28 Aug - 02 Sep Icelandair direct
18 Aug - 31 Aug Icelandair direct
11 Aug - 15 Aug Icelandair direct

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

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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.

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