Cheapest return flights from Denver to Keflavik in May from $554

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 May 2025 (see full year).

Return flights

05 May - 12 May Frontier Airlines
05 May - 13 May Icelandair direct
11 May - 19 May Icelandair direct
02 May - 10 May Icelandair direct
18 May - 26 May Icelandair direct
02 May - 09 May Icelandair direct
03 May - 10 May Icelandair direct
05 May - 12 May Icelandair direct
06 May - 13 May Icelandair direct
07 May - 14 May Icelandair direct
25 May - 02 Jun Icelandair direct
27 May - 04 Jun Icelandair direct
30 May - 06 Jun Icelandair direct
24 May - 01 Jun Icelandair direct
29 May - 06 Jun Icelandair direct
29 May - 05 Jun Icelandair direct
30 May - 07 Jun Icelandair direct
26 May - 02 Jun Icelandair direct
27 May - 03 Jun Icelandair direct
28 May - 05 Jun jetBlue

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

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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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