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

Return flights

24 Oct - 15 Nov	Icelandair
26 Oct - 15 Nov	Icelandair
23 Oct - 01 Nov	Icelandair
24 Oct - 01 Nov	Icelandair
25 Oct - 02 Nov	Icelandair
30 Oct - 07 Nov	Icelandair
25 Oct - 03 Nov	Icelandair
26 Oct - 02 Nov	Icelandair
29 Oct - 05 Nov	Icelandair
20 Oct - 27 Oct	Scandinavian Airlines	direct
23 Oct - 01 Nov	Scandinavian Airlines	direct
09 Oct - 14 Oct	Icelandair
07 Oct - 14 Oct	Icelandair
09 Oct - 16 Oct	Icelandair
07 Oct - 21 Oct	Icelandair
05 Oct - 20 Oct	Icelandair
05 Oct - 25 Oct	Icelandair
10 Oct - 14 Oct	Icelandair
09 Oct - 13 Oct	Icelandair
14 Oct - 21 Oct	Scandinavian Airlines	direct

Also check the deals for one-way flights from Chicago to Copenhagen 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 Copenhagen in October from 381€

Return flights