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

Return flights

04 Sep - 20 Sep	TAP
26 Sep - 30 Sep	Icelandair
17 Sep - 01 Oct	Icelandair
26 Sep - 05 Oct	Icelandair
25 Sep - 01 Oct	Icelandair
05 Sep - 23 Sep	Icelandair
25 Sep - 28 Sep	Icelandair
08 Sep - 15 Sep	Icelandair
01 Sep - 30 Sep	Icelandair
26 Sep - 04 Oct	KLM
21 Sep - 05 Oct	Delta
18 Sep - 26 Sep	Delta
24 Sep - 28 Sep	Delta
18 Sep - 24 Sep	Delta
07 Sep - 14 Sep	Delta

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

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 Berlin to Chicago in September from $460

Return flights