Cheapest return flights from Denver to Keflavik in August from 350€

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

Return flights

17 Aug - 24 Aug Icelandair direct
24 Aug - 30 Aug Icelandair direct
22 Aug - 24 Aug Icelandair direct
21 Aug - 24 Aug Icelandair direct
28 Aug - 31 Aug Icelandair direct
21 Aug - 26 Aug Icelandair direct
19 Aug - 26 Aug Icelandair direct
24 Aug - 01 Sep Icelandair direct
16 Aug - 26 Aug Icelandair direct
16 Aug - 20 Aug Icelandair direct
31 Aug - 06 Sep Frontier Airlines
30 Aug - 06 Sep Frontier Airlines
16 Aug - 25 Aug Icelandair direct
30 Aug - 06 Sep Icelandair direct
30 Aug - 20 Sep Frontier Airlines

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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