Cheapest return flights from Chicago to Keflavik in September from $372

Best time to book flights for Chicago (ORD) to Keflavik (KEF) flights at AirHint

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

Return flights

29 Sep - 04 Oct Icelandair direct
27 Sep - 02 Oct Icelandair direct
30 Sep - 05 Oct Icelandair direct
25 Sep - 02 Oct Icelandair direct
20 Sep - 28 Sep Icelandair direct
09 Sep - 17 Sep Icelandair direct
17 Sep - 22 Sep Icelandair direct
01 Sep - 06 Sep Icelandair direct
10 Sep - 18 Sep Icelandair direct
20 Sep - 25 Sep Icelandair direct
16 Sep - 24 Sep Icelandair direct
07 Sep - 14 Sep Icelandair direct
03 Sep - 10 Sep Icelandair direct
23 Sep - 30 Sep Icelandair direct
25 Sep - 01 Oct Icelandair direct
30 Sep - 06 Oct Icelandair direct
26 Sep - 02 Oct Icelandair direct
28 Sep - 04 Oct Icelandair direct
27 Sep - 03 Oct Icelandair direct
29 Sep - 05 Oct Icelandair direct

Also check the deals for one-way flights from Chicago 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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