Flight Kuala Lumpur International Airport departs from Kuala Lumpur Kuala Lumpur International Airport at 20:40 and arrives at Singapore Changi Airport at 21:50.
The flighttime is about 1h 10m. The distance travelled ("as the bird flies"): 256 Km. So the average speed is roughly 219 Km.
The best day to arrive at Kuala Lumpur is Friday and it would be best to avoid Thursday, as prices are on average 97.49% higher than on Friday. (Average prices, based on 83818411 datapoints.)
We have a lot more statistics for flights SQ 125 and between Kuala Lumpur and Singapore.
THB