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

Return flights

28 Dec - 16 Jan	Icelandair
31 Dec - 24 Jan	Icelandair
30 Dec - 24 Jan	Icelandair
31 Dec - 12 Jan	Icelandair
30 Dec - 11 Jan	Icelandair
31 Dec - 11 Jan	Icelandair
05 Dec - 12 Dec	TAP
29 Dec - 16 Jan	Aer Lingus
27 Dec - 16 Jan	Aer Lingus
05 Dec - 10 Dec	Aer Lingus
24 Dec - 17 Jan	Iberia
29 Dec - 24 Jan	Scandinavian Airlines
12 Dec - 16 Dec	TAP
08 Dec - 15 Dec	Scandinavian Airlines
07 Dec - 27 Dec	Icelandair
05 Dec - 27 Dec	Icelandair
11 Dec - 18 Dec	Scandinavian Airlines
13 Dec - 24 Dec	Frontier Airlines
04 Dec - 11 Dec	Scandinavian Airlines
22 Dec - 29 Dec	Icelandair

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

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 December from 410€

Return flights