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

Return flights

18 Sep - 20 Sep	Air China
19 Sep - 21 Sep	Air China
12 Sep - 22 Sep	Air China
08 Sep - 18 Sep	Air China
24 Sep - 11 Oct	Air China
24 Sep - 17 Oct	Air China
24 Sep - 19 Oct	Air China
08 Sep - 19 Sep	Air China
01 Sep - 14 Sep	Air China
14 Sep - 20 Sep	Air China
05 Sep - 20 Sep	Air China
08 Sep - 22 Sep	Air China
01 Sep - 13 Sep	Air China
23 Sep - 12 Oct	Air China
30 Sep - 23 Oct	Etihad Airways
25 Sep - 08 Oct	KLM
26 Sep - 10 Oct	SWISS
29 Sep - 13 Oct	KLM
18 Sep - 08 Oct	SWISS
21 Sep - 01 Oct	Scandinavian Airlines

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

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 Copenhagen to Seoul in September from 510€

Return flights