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

Return flights

04 Dec - 11 Dec	Delta
25 Dec - 10 Jan	Frontier Airlines
02 Dec - 16 Dec	KLM
19 Dec - 28 Dec	Frontier Airlines
24 Dec - 11 Jan	Delta
18 Dec - 03 Jan	Frontier Airlines
20 Dec - 30 Dec	Frontier Airlines
12 Dec - 27 Dec	Delta
07 Dec - 11 Dec	Delta
05 Dec - 09 Dec	Delta
05 Dec - 11 Dec	Delta
05 Dec - 12 Dec	Delta
12 Dec - 19 Dec	Southwest Airlines

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 $883

Return flights