Flight Changi Airport departs from Singapore Changi Airport at 09:55 and arrives at Kuala Lumpur Kuala Lumpur International Airport at 11:10.
The flighttime is about 1h 15m. The distance travelled ("as the bird flies"): 256 Km. So the average speed is roughly 205 Km.
The best day to arrive at Singapore is Tuesday and it would be best to avoid Wednesday, as prices are on average 57.05% higher than on Tuesday. (Average prices, based on 80532975 datapoints.)
We have a lot more statistics for flights MH 604 and between Singapore and Kuala Lumpur.