Cheapest return flights from Chicago to Keflavik in September from $611

AirHint found the following cheapest return flights from Chicago (ORD) to Keflavik (KEF) in September 2026 (see full year).

Return flights

04 Sep - 13 Sep Icelandair direct
20 Sep - 27 Sep Icelandair direct
11 Sep - 18 Sep Icelandair direct
21 Sep - 27 Sep Scandinavian Airlines
01 Sep - 04 Sep Scandinavian Airlines
21 Sep - 27 Sep Icelandair direct
12 Sep - 19 Sep Scandinavian Airlines
12 Sep - 19 Sep Icelandair direct
21 Sep - 28 Sep Scandinavian Airlines
10 Sep - 17 Sep United

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

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