Cheapest return flights from Chicago to Keflavik in October from 342€

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

Return flights

27 Oct - 05 Nov Icelandair direct
30 Oct - 22 Nov Icelandair direct
31 Oct - 22 Nov Icelandair direct
29 Oct - 03 Nov Icelandair direct
31 Oct - 02 Nov Icelandair direct
30 Oct - 02 Nov Icelandair direct
22 Oct - 15 Nov Lufthansa
22 Oct - 15 Nov Icelandair direct
21 Oct - 01 Nov Spirit Airlines
20 Oct - 15 Nov Icelandair direct
23 Oct - 30 Oct Frontier Airlines
20 Oct - 24 Oct Icelandair
20 Oct - 28 Oct Icelandair
17 Oct - 24 Oct Spirit Airlines
19 Oct - 26 Oct Spirit Airlines
26 Oct - 28 Oct Icelandair
16 Oct - 20 Oct Icelandair direct
18 Oct - 20 Oct Icelandair direct
19 Oct - 22 Oct Frontier Airlines
20 Oct - 28 Oct Icelandair direct

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

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