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

Return flights

29 Aug - 03 Sep	Asiana Airlines
21 Aug - 31 Aug	Asiana Airlines
14 Aug - 23 Aug	Air China
11 Aug - 17 Aug	Air China
08 Aug - 16 Aug	ANA
05 Aug - 09 Aug	ANA
17 Aug - 29 Aug	Japan Airlines
06 Aug - 19 Aug	Japan Airlines
17 Aug - 26 Aug	Japan Airlines
30 Aug - 06 Sep	Japan Airlines
17 Aug - 30 Aug	Japan Airlines
03 Aug - 06 Aug	Japan Airlines

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 620€

Return flights