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

Return flights

02 Sep - 15 Sep	Air China
04 Sep - 10 Sep	Air China
17 Sep - 22 Sep	Air China
08 Sep - 18 Sep	Air China
15 Sep - 17 Sep	Air China
16 Sep - 20 Sep	Air China
16 Sep - 24 Sep	Air China
15 Sep - 26 Sep	Air China
24 Sep - 27 Sep	Air China
02 Sep - 19 Sep	Air China
24 Sep - 24 Oct	Air China
24 Sep - 16 Oct	Air China
20 Sep - 02 Oct	Air China
24 Sep - 01 Oct	Air China
25 Sep - 01 Oct	Air China
25 Sep - 23 Oct	Air China
20 Sep - 05 Oct	Air India
20 Sep - 02 Oct	Scandinavian Airlines	direct
25 Sep - 13 Oct	Air China
25 Sep - 03 Oct	Air France

Also check the deals for one-way flights from Seoul to Copenhagen 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 Seoul to Copenhagen in September from $637

Return flights