Cheapest return flights from Denver to Keflavik in July from $528

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 July 2025 (see full year).

Return flights

13 Jul - 18 Jul Icelandair direct
15 Jul - 23 Jul Icelandair direct
26 Jul - 02 Aug Icelandair direct
24 Jul - 28 Jul Icelandair direct
19 Jul - 26 Jul Icelandair direct
21 Jul - 05 Aug Frontier Airlines
21 Jul - 31 Jul Frontier Airlines
21 Jul - 31 Jul Icelandair direct
21 Jul - 05 Aug Icelandair direct

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

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.

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