Cheapest return flights from Denver to Keflavik in March from 539€

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 March 2025 (see full year).

Return flights

31 Mar - 08 Apr Frontier Airlines
18 Mar - 10 Apr Frontier Airlines
12 Mar - 16 Mar Lufthansa
16 Mar - 20 Mar Frontier Airlines
19 Mar - 23 Mar Lufthansa
18 Mar - 10 Apr Icelandair direct
16 Mar - 21 Mar Frontier Airlines
22 Mar - 29 Mar Frontier Airlines
13 Mar - 20 Mar Lufthansa
13 Mar - 15 Mar Frontier Airlines
20 Mar - 23 Mar Lufthansa
14 Mar - 17 Mar Frontier Airlines
15 Mar - 23 Mar Frontier Airlines

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

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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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