Cheapest return flights from Chicago to Keflavik in October from $379

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

Return flights

29 Oct - 05 Nov Icelandair direct
31 Oct - 07 Nov Icelandair direct
27 Oct - 05 Nov Icelandair direct
29 Oct - 03 Nov Icelandair direct
20 Oct - 07 Nov Icelandair direct
22 Oct - 29 Oct Frontier Airlines
31 Oct - 03 Nov Icelandair direct
28 Oct - 04 Nov Icelandair direct
22 Oct - 15 Nov Scandinavian Airlines
23 Oct - 30 Oct Spirit Airlines
21 Oct - 15 Nov Scandinavian Airlines
21 Oct - 15 Nov Icelandair direct
17 Oct - 21 Oct Icelandair
17 Oct - 21 Oct Icelandair direct
21 Oct - 25 Oct Spirit Airlines
20 Oct - 23 Oct Icelandair
18 Oct - 25 Oct Spirit Airlines
23 Oct - 30 Oct Icelandair direct
21 Oct - 25 Oct Icelandair direct
19 Oct - 21 Oct Icelandair direct

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

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