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

Return flights

14 Sep - 17 Sep	Air China
15 Sep - 22 Sep	Air China
02 Sep - 09 Sep	Air China
10 Sep - 17 Sep	Air China
04 Sep - 18 Sep	Air China
04 Sep - 17 Sep	Air China
18 Sep - 24 Sep	China Eastern
08 Sep - 16 Sep	Air China
09 Sep - 23 Sep	Air China
07 Sep - 18 Sep	Air China
25 Sep - 23 Oct	Etihad Airways
24 Sep - 08 Oct	Air France
24 Sep - 07 Oct	Air France
25 Sep - 25 Oct	Etihad Airways
28 Sep - 13 Oct	Air China
25 Sep - 07 Oct	Air France
29 Sep - 17 Oct	Air France
16 Sep - 01 Oct	Norwegian Air Sweden AOC
30 Sep - 18 Oct	Scandinavian Airlines
18 Sep - 02 Oct	Norwegian Air Sweden AOC

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 466€

Return flights