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

Return flights

20 Sep - 27 Sep	Cebu Pacific
27 Sep - 04 Oct	Philippines AirAsia Inc.
13 Sep - 20 Sep	Royal Brunei	direct
16 Sep - 24 Sep	Royal Brunei	direct
13 Sep - 17 Sep	Royal Brunei	direct
27 Sep - 04 Oct	Royal Brunei	direct
02 Sep - 09 Sep	Royal Brunei	direct
17 Sep - 19 Sep	Singapore Airlines
19 Sep - 27 Sep	Singapore Airlines
11 Sep - 27 Sep	AirAsia X
13 Sep - 27 Sep	AirAsia X
12 Sep - 27 Sep	AirAsia X
26 Sep - 04 Oct	AirAsia X
25 Sep - 04 Oct	AirAsia X
16 Sep - 04 Oct	AirAsia X
17 Sep - 04 Oct	AirAsia X
26 Sep - 07 Oct	AirAsia X
25 Sep - 07 Oct	AirAsia X
26 Sep - 12 Oct	AirAsia X
27 Sep - 07 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 247€

Return flights