Cheapest return flights from Chicago to Keflavik in October from $528

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 October 2025 (see full year).

Return flights

19 Oct - 24 Oct Icelandair direct
17 Oct - 25 Oct Icelandair direct
08 Oct - 12 Oct Icelandair direct
05 Oct - 16 Oct Spirit Airlines
05 Oct - 16 Oct Icelandair direct
13 Oct - 17 Oct Spirit Airlines
13 Oct - 17 Oct Icelandair direct

Also check the deals for one-way 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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