AirHint found the following cheapest return flights from Chicago (ORD) to Keflavik (KEF) in October 2026 (see full year).

Return flights

14 Oct - 18 Oct	Icelandair	direct
14 Oct - 19 Oct	Icelandair	direct
02 Oct - 11 Oct	Icelandair	direct
24 Oct - 01 Nov	Icelandair	direct
23 Oct - 01 Nov	Icelandair	direct
16 Oct - 21 Oct	Icelandair	direct
23 Oct - 02 Nov	Icelandair	direct
17 Oct - 24 Oct	Scandinavian Airlines
22 Oct - 01 Nov	Icelandair	direct
25 Oct - 01 Nov	Icelandair	direct
17 Oct - 24 Oct	Icelandair	direct

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

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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Cheapest return flights from Chicago to Keflavik in October from $619

Return flights