AirHint found the following cheapest return flights from Seoul (ICN) to Bandar Seri Begawan (BWN) in December 2025 (see full year).

Return flights

23 Dec - 27 Dec	AirAsia
01 Dec - 03 Dec	AirAsia X
03 Dec - 06 Dec	Royal Brunei	direct
02 Dec - 05 Dec	AirAsia X
16 Dec - 23 Dec	Singapore Airlines
24 Dec - 31 Dec	Royal Brunei	direct
24 Dec - 03 Jan	Royal Brunei	direct
09 Dec - 12 Dec	AirAsia X
23 Dec - 27 Dec	Royal Brunei	direct
10 Dec - 13 Dec	AirAsia X
20 Dec - 24 Dec	Royal Brunei	direct
25 Dec - 01 Jan	AirAsia X
30 Dec - 03 Jan	AirAsia X
30 Dec - 03 Jan	Royal Brunei	direct

Also check the deals for one-way flights from Seoul to Bandar Seri Begawan 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 Bandar Seri Begawan in December from 409€

Return flights