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

Return flights

04 Dec - 15 Dec	Lufthansa
02 Dec - 15 Dec	Lufthansa
08 Dec - 15 Dec	Lufthansa
03 Dec - 07 Dec	Turkish Airlines
16 Dec - 19 Jan	Lufthansa
14 Dec - 18 Jan	Lufthansa
23 Dec - 18 Jan	Lufthansa
27 Dec - 04 Jan	Finnair
28 Dec - 04 Jan	Finnair
25 Dec - 04 Jan	Finnair
27 Dec - 05 Jan	Finnair
22 Dec - 18 Jan	Lufthansa
26 Dec - 10 Jan	Finnair
26 Dec - 04 Jan	Finnair
20 Dec - 27 Dec	Finnair
19 Dec - 27 Dec	LOT

Also check the deals for one-way flights from Brussels to Seoul 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 Brussels to Seoul in December from $632

Return flights