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

Return flights

11 Aug - 10 Sep	Lufthansa
20 Aug - 31 Aug	LOT
20 Aug - 27 Aug	LOT
19 Aug - 02 Sep	Finnair
05 Aug - 19 Aug	Etihad Airways
12 Aug - 19 Aug	LOT
03 Aug - 31 Aug	Lufthansa
11 Aug - 24 Aug	Lufthansa
21 Aug - 10 Sep	Lufthansa
05 Aug - 11 Aug	Etihad Airways
15 Aug - 19 Aug	Emirates
06 Aug - 11 Aug	Emirates
05 Aug - 10 Aug	Etihad Airways
30 Aug - 04 Sep	Etihad Airways
29 Aug - 05 Sep	Emirates
29 Aug - 03 Sep	Etihad Airways

Also check the deals for one-way flights from Seoul to Brussels in August.

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 Brussels in August from $781

Return flights