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

Return flights

04 Sep - 14 Sep	Lufthansa
03 Sep - 20 Oct	Lufthansa
30 Sep - 14 Oct	Etihad Airways
01 Sep - 08 Sep	Hainan Airlines
08 Sep - 24 Sep	Hainan Airlines
01 Sep - 14 Sep	SWISS
08 Sep - 14 Sep	Lufthansa
22 Sep - 07 Oct	Lufthansa
27 Sep - 17 Oct	SWISS
01 Sep - 11 Sep	Hainan Airlines
03 Sep - 10 Oct	Lufthansa
08 Sep - 10 Oct	Lufthansa
01 Sep - 13 Sep	Hainan Airlines
01 Sep - 06 Oct	SWISS
04 Sep - 16 Sep	Etihad Airways
04 Sep - 19 Sep	Lufthansa
04 Sep - 12 Sep	Lufthansa
29 Sep - 08 Oct	Finnair
27 Sep - 24 Oct	Finnair
27 Sep - 18 Oct	Etihad Airways

Also check the deals for one-way flights from Brussels 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.

Book a cheap hotel in Seoul

Cheap car rent in Seoul

Cheapest return flights from Brussels to Seoul in September from 556€

Return flights