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

Return flights

22 Dec - 31 Dec	Air China
01 Dec - 10 Dec	Etihad Airways
09 Dec - 13 Dec	LOT
15 Dec - 05 Jan	Air China
27 Dec - 06 Jan	LOT
24 Dec - 31 Dec	LOT
06 Dec - 16 Dec	LOT
13 Dec - 31 Dec	LOT
02 Dec - 06 Dec	LOT
16 Dec - 28 Jan	LOT
19 Dec - 09 Jan	Lufthansa
22 Dec - 06 Jan	Lufthansa
16 Dec - 06 Jan	Lufthansa
21 Dec - 30 Dec	KLM
24 Dec - 27 Dec	LOT
24 Dec - 29 Dec	LOT
18 Dec - 12 Jan	KLM
25 Dec - 04 Jan	Lufthansa
20 Dec - 02 Jan	Air China
04 Dec - 03 Jan	Asiana Airlines

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

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 December from 475€

Return flights