AirHint found the following cheapest return flights from Brussels (BRU) to Seoul (ICN) in September 2026 (see full year).

Return flights

02 Sep - 09 Sep	Etihad Airways
03 Sep - 10 Sep	Etihad Airways
22 Sep - 29 Sep	Etihad Airways
08 Sep - 16 Sep	Etihad Airways
08 Sep - 22 Sep	Etihad Airways
07 Sep - 22 Sep	Etihad Airways
24 Sep - 05 Oct	Cathay Pacific
22 Sep - 14 Oct	Lufthansa
30 Sep - 07 Oct	Lufthansa
09 Sep - 16 Sep	Qatar Airways
23 Sep - 30 Sep	Qatar Airways
21 Sep - 28 Sep	Qatar Airways
01 Sep - 13 Sep	Cathay Pacific
14 Sep - 02 Oct	Cathay Pacific
24 Sep - 18 Oct	Cathay Pacific
13 Sep - 01 Oct	Finnair
20 Sep - 05 Oct	Finnair
29 Sep - 19 Oct	Air China
29 Sep - 06 Oct	Lufthansa
14 Sep - 01 Oct	Finnair

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.

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Cheapest return flights from Brussels to Seoul in September from $714

Return flights