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

Return flights

09 Sep - 16 Sep	Air China
10 Sep - 13 Sep	Air China
15 Sep - 28 Sep	Air China
08 Sep - 13 Sep	Air China
10 Sep - 15 Sep	Air China
01 Sep - 05 Sep	Air China
13 Sep - 16 Sep	Air China
26 Sep - 17 Oct	Air China
25 Sep - 05 Oct	Japan Airlines
25 Sep - 14 Oct	Japan Airlines
03 Sep - 17 Sep	Japan Airlines
24 Sep - 05 Oct	Japan Airlines
13 Sep - 18 Sep	Asiana Airlines
25 Sep - 28 Sep	Japan Airlines
25 Sep - 02 Oct	Japan Airlines
25 Sep - 16 Oct	Japan Airlines
25 Sep - 13 Oct	Japan Airlines
26 Sep - 05 Oct	Japan Airlines
27 Sep - 05 Oct	Japan Airlines
27 Sep - 02 Oct	Japan Airlines

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 712€

Return flights