Flight Changi Airport departs from Singapore Changi Airport at 19:55 and arrives at Kuala Lumpur Kuala Lumpur International Airport at 21:00.
The flighttime is about 1h 05m. The distance travelled ("as the bird flies"): 256 Km. So the average speed is roughly 236 Km.
The best day to arrive at Singapore is Saturday and it would be best to avoid Thursday, as prices are on average 28.65% higher than on Saturday. (Average prices, based on 93855137 datapoints.)
We have a lot more statistics for flights SQ 128 and between Singapore and Kuala Lumpur.
