Cheapest return flights from Denver to Keflavik in May from $523

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

29 May - 04 Jun Icelandair direct
29 May - 02 Jun Icelandair direct
29 May - 01 Jun Icelandair direct
30 May - 01 Jun Icelandair direct
18 May - 26 May Icelandair direct
28 May - 11 Jun Icelandair direct
17 May - 26 May Delta
15 May - 19 May Air France
19 May - 23 May Icelandair direct
24 May - 31 May Icelandair direct
29 May - 03 Jun Icelandair direct
23 May - 01 Jun Icelandair direct
21 May - 29 May Icelandair direct
16 May - 23 May Lufthansa
17 May - 19 May Air France
14 May - 17 May Delta
15 May - 19 May Icelandair direct

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

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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