AirHint found the following cheapest return flights from Cologne (CGN) to Copenhagen (CPH) in August 2025 (see full year).

Return flights

27 Aug - 28 Aug	Ryanair
26 Aug - 28 Aug	Ryanair
28 Aug - 01 Sep	Ryanair
28 Aug - 03 Sep	Ryanair
27 Aug - 01 Sep	Ryanair
27 Aug - 31 Aug	Ryanair
28 Aug - 30 Aug	Ryanair
25 Aug - 28 Aug	Ryanair
30 Aug - 31 Aug	Lufthansa
26 Aug - 31 Aug	Ryanair
26 Aug - 29 Aug	Ryanair
28 Aug - 29 Aug	Ryanair
25 Aug - 27 Aug	Ryanair
23 Aug - 07 Sep	Eurowings
29 Aug - 04 Sep	SWISS

Also check the deals for one-way flights from Cologne to Copenhagen in August.

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 Cologne to Copenhagen in August from 171€

Return flights