Cheapest return flights from Chicago to Keflavik in September from $606

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

Return flights

08 Sep - 17 Sep Scandinavian Airlines
04 Sep - 08 Sep Icelandair direct
01 Sep - 08 Sep Icelandair direct
02 Sep - 09 Sep Icelandair direct
04 Sep - 11 Sep Icelandair direct
05 Sep - 12 Sep Icelandair direct
06 Sep - 13 Sep Icelandair direct
09 Sep - 16 Sep Icelandair direct
08 Sep - 15 Sep Finnair
10 Sep - 17 Sep Finnair
26 Sep - 08 Oct Air Canada
26 Sep - 08 Oct Icelandair direct

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

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