Cheapest return flights from Detroit to Keflavik in September from $449

Best time to book flights for Detroit (DTW) to Keflavik (KEF) flights at AirHint

AirHint found the following cheapest return flights from Detroit (DTW) to Keflavik (KEF) in September 2025 (see full year).

Return flights

06 Sep - 13 Sep Icelandair direct
29 Sep - 07 Oct Icelandair direct
23 Sep - 01 Oct Air France direct
25 Sep - 03 Oct Delta direct
27 Sep - 05 Oct Air France direct
28 Sep - 06 Oct Air France direct
30 Sep - 08 Oct Delta direct
04 Sep - 25 Sep Icelandair direct
26 Sep - 04 Oct KLM
22 Sep - 30 Sep Icelandair direct
13 Sep - 20 Sep Icelandair direct
18 Sep - 25 Sep Icelandair direct
20 Sep - 27 Sep Icelandair direct
15 Sep - 21 Sep Air France direct
21 Sep - 28 Sep Air France direct
24 Sep - 02 Oct Spirit Airlines
19 Sep - 26 Sep Air Canada

Also check the deals for one-way flights from Detroit to Keflavik in September.

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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