Flight Changi Airport departs from Singapore Changi Airport at 21:25 and arrives at Bandar Seri Begawan Brunei International Airport at 23:35.
The flighttime is about 2h 10m. The distance travelled ("as the bird flies"): 1223 Km. So the average speed is roughly 564 Km.
The best day to arrive at Singapore is Monday and it would be best to avoid Friday, as prices are on average 23.23% higher than on Monday. (Average prices, based on 3147786 datapoints.)
We have a lot more statistics for flights GA 424 and between Singapore and Bandar Seri Begawan.