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

Return flights

21 Aug - 28 Aug	Lufthansa
24 Aug - 13 Sep	Lufthansa
17 Aug - 24 Aug	Icelandair
20 Aug - 26 Aug	United
31 Aug - 07 Sep	Air Canada
19 Aug - 23 Aug	Scandinavian Airlines
28 Aug - 20 Sep	Spirit Airlines
18 Aug - 23 Aug	Icelandair
29 Aug - 01 Sep	Spirit Airlines
17 Aug - 21 Aug	TAP
27 Aug - 01 Sep	Lufthansa

Also check the deals for one-way flights from Chicago to Berlin in August.

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 August from 582€

Return flights