Cheapest return flights from Chicago to Copenhagen in September from 644€

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

Return flights

05 Sep - 19 Sep Virgin Atlantic
30 Sep - 12 Oct KLM
18 Sep - 22 Sep Frontier Airlines
20 Sep - 29 Sep Virgin Atlantic
19 Sep - 28 Sep Porter Airlines (Canada) Ltd
19 Sep - 27 Sep Frontier Airlines
20 Sep - 28 Sep Frontier Airlines
19 Sep - 23 Sep Delta

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

Skyscanner

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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