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

Return flights

18 Oct - 26 Oct	Scandinavian Airlines
12 Oct - 19 Oct	Icelandair
23 Oct - 28 Oct	Scandinavian Airlines
23 Oct - 04 Nov	Scandinavian Airlines
20 Oct - 05 Nov	Scandinavian Airlines
18 Oct - 25 Oct	Scandinavian Airlines
22 Oct - 28 Oct	Turkish Airlines
11 Oct - 18 Oct	Scandinavian Airlines
15 Oct - 30 Oct	Lufthansa
15 Oct - 20 Oct	Turkish Airlines
02 Oct - 09 Oct	Frontier Airlines
07 Oct - 10 Oct	Spirit Airlines

Also check the deals for one-way flights from Chicago to Berlin 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 Berlin in October from $520

Return flights