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

Return flights

23 Sep - 27 Sep	Royal Brunei	direct
24 Sep - 27 Sep	Royal Brunei	direct
03 Sep - 10 Sep	Royal Brunei	direct
16 Sep - 30 Sep	Royal Brunei	direct
17 Sep - 20 Sep	Royal Brunei	direct
30 Sep - 08 Oct	Royal Brunei	direct
23 Sep - 28 Sep	AirAsia X
23 Sep - 30 Sep	AirAsia X
03 Sep - 20 Sep	AirAsia X
10 Sep - 13 Sep	Royal Brunei	direct
17 Sep - 27 Sep	AirAsia X
23 Sep - 04 Oct	AirAsia X
24 Sep - 04 Oct	AirAsia X
30 Sep - 11 Oct	Royal Brunei	direct
23 Sep - 03 Oct	AirAsia X
17 Sep - 04 Oct	AirAsia X
24 Sep - 03 Oct	AirAsia X
23 Sep - 12 Oct	AirAsia X
24 Sep - 12 Oct	AirAsia X
17 Sep - 03 Oct	AirAsia X

Also check the deals for one-way flights from Seoul to Bandar Seri Begawan in September.

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 September from $365

Return flights