Cheapest one-way flights from Chicago to Keflavik in October from 272€

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

One-Way flights

22 Oct Frontier Airlines
20 Oct Frontier Airlines
21 Oct Spirit Airlines
30 Oct Icelandair direct
31 Oct Icelandair direct
20 Oct Icelandair direct
21 Oct Icelandair direct
19 Oct Frontier Airlines
25 Oct Spirit Airlines
22 Oct Icelandair direct

Also check the deals for return flights from Chicago to Keflavik in October.

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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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