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

Return flights

29 Dec - 10 Jan	Lufthansa
31 Dec - 04 Jan	Etihad Airways
26 Dec - 09 Jan	Lufthansa
29 Dec - 04 Jan	Lufthansa
26 Dec - 30 Dec	Qatar Airways
23 Dec - 31 Dec	Qatar Airways
26 Dec - 31 Dec	Qatar Airways
25 Dec - 01 Jan	Qatar Airways
26 Dec - 04 Jan	Lufthansa
23 Dec - 27 Dec	Qatar Airways
22 Dec - 27 Dec	Qatar Airways
25 Dec - 31 Dec	KLM
28 Dec - 04 Jan	Lufthansa
27 Dec - 01 Jan	Etihad Airways
30 Dec - 03 Jan	Finnair
27 Dec - 03 Jan	KLM

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 500€

Return flights