Cheapest return flights from Denver to Keflavik in October from $423

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 October 2025 (see full year).

Return flights

14 Oct - 20 Oct Icelandair direct
07 Oct - 14 Oct Icelandair direct
05 Oct - 15 Oct Icelandair direct
02 Oct - 09 Oct Icelandair direct
19 Oct - 25 Oct Icelandair direct
01 Oct - 08 Oct Icelandair direct
11 Oct - 17 Oct Icelandair direct
10 Oct - 17 Oct Icelandair direct
21 Oct - 28 Oct Icelandair direct
04 Oct - 11 Oct Icelandair direct

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

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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