Cheapest return flights from Chicago to Copenhagen in December from 672€

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

Return flights

05 Dec - 13 Dec KLM
04 Dec - 27 Dec Frontier Airlines
02 Dec - 27 Dec Frontier Airlines
05 Dec - 27 Dec Southwest Airlines
20 Dec - 29 Dec KLM
22 Dec - 26 Dec Southwest Airlines
24 Dec - 27 Dec Southwest Airlines
23 Dec - 01 Jan Southwest Airlines
17 Dec - 28 Dec KLM
26 Dec - 03 Jan Delta
14 Dec - 03 Jan KLM
17 Dec - 03 Jan KLM

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

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