Cheapest return flights from Detroit to Keflavik in September from $313

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

Return flights

30 Sep - 25 Oct Icelandair direct
29 Sep - 20 Oct Icelandair direct
30 Sep - 07 Oct Icelandair direct
16 Sep - 23 Sep Icelandair direct
22 Sep - 29 Sep Icelandair direct
11 Sep - 14 Sep Air Canada
28 Sep - 06 Oct Air France direct
28 Sep - 07 Oct Air France direct
25 Sep - 06 Oct Delta direct
04 Sep - 08 Sep Air Canada
28 Sep - 08 Oct Spirit Airlines
06 Sep - 13 Sep Air Canada
27 Sep - 01 Oct Spirit Airlines
25 Sep - 01 Oct Spirit Airlines
15 Sep - 11 Oct Spirit Airlines
20 Sep - 25 Sep Spirit Airlines
25 Sep - 30 Sep Spirit Airlines
19 Sep - 25 Sep Spirit Airlines
20 Sep - 25 Sep Icelandair direct
11 Sep - 14 Sep Air France direct

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

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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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