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

Return flights

04 Sep - 10 Sep	Lufthansa
13 Sep - 17 Sep	Air China
13 Sep - 18 Sep	Air China
13 Sep - 20 Sep	Air China
13 Sep - 25 Sep	Air China
15 Sep - 24 Sep	Air China
13 Sep - 19 Sep	Air China
15 Sep - 19 Sep	Air China
13 Sep - 27 Sep	Air China
08 Sep - 15 Sep	Finnair
26 Sep - 05 Oct	Air India
27 Sep - 05 Oct	Air India
21 Sep - 05 Oct	Air India
30 Sep - 15 Oct	Air India
19 Sep - 03 Oct	Air India
27 Sep - 03 Oct	Air India
26 Sep - 03 Oct	Air India
26 Sep - 12 Oct	Air India
23 Sep - 02 Oct	LOT
25 Sep - 06 Oct	Air China

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.

Book a cheap hotel in Copenhagen

Cheap car rent in Copenhagen

Cheapest return flights from Seoul to Copenhagen in September from 547€

Return flights