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

Return flights

04 Dec - 10 Dec	Ryanair
01 Dec - 14 Dec	KLM
03 Dec - 13 Dec	KLM
01 Dec - 13 Dec	KLM
27 Dec - 13 Jan	Ryanair
05 Dec - 08 Dec	Ryanair
06 Dec - 13 Dec	Ryanair
10 Dec - 19 Dec	Hainan Airlines
29 Dec - 21 Jan	Hainan Airlines
12 Dec - 19 Dec	Brussels Airlines
12 Dec - 20 Dec	Brussels Airlines
09 Dec - 17 Dec	Turkish Airlines
30 Dec - 17 Jan	Finnair
13 Dec - 04 Jan	Wizz Air
25 Dec - 17 Jan	Brussels Airlines
24 Dec - 24 Jan	LOT
26 Dec - 17 Jan	easyJet
22 Dec - 01 Jan	Air China
25 Dec - 10 Jan	Finnair
17 Dec - 07 Jan	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 527€

Return flights