Cheapest return flights from Chicago to Keflavik in September from 774€

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

Return flights

02 Sep - 09 Sep Air France
08 Sep - 17 Sep Air France
05 Sep - 15 Sep Air France
12 Sep - 21 Sep Southwest Airlines
16 Sep - 28 Sep KLM
11 Sep - 21 Sep KLM
03 Sep - 10 Sep Southwest Airlines
04 Sep - 13 Sep Air France
04 Sep - 12 Sep Air France
23 Sep - 30 Sep KLM
30 Sep - 07 Oct KLM

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

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