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

Return flights

24 Dec - 30 Dec	Etihad Airways
22 Dec - 06 Jan	Lufthansa
17 Dec - 06 Jan	Lufthansa
14 Dec - 23 Dec	Lufthansa
16 Dec - 06 Jan	Lufthansa
16 Dec - 24 Dec	Lufthansa
23 Dec - 29 Dec	Lufthansa
30 Dec - 06 Jan	Lufthansa
21 Dec - 28 Dec	Etihad Airways
19 Dec - 02 Jan	Asiana Airlines
22 Dec - 27 Dec	Asiana Airlines
20 Dec - 27 Dec	Asiana Airlines
23 Dec - 03 Jan	Lufthansa
01 Dec - 08 Dec	Lufthansa
27 Dec - 07 Jan	Etihad Airways
27 Dec - 06 Jan	Etihad Airways
25 Dec - 31 Dec	KLM
24 Dec - 29 Dec	Etihad Airways
19 Dec - 09 Jan	Etihad Airways
27 Dec - 02 Jan	Finnair

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.

Book a cheap hotel in Brussels

Cheap car rent in Brussels

Cheapest return flights from Seoul to Brussels in December from 534€

Return flights