Flight Changi Airport departs from Singapore Changi Airport at 18:10 and arrives at Kuala Lumpur Kuala Lumpur International Airport at 19:20.
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 Singapore is Wednesday and it would be best to avoid Monday, as prices are on average 102.72% higher than on Wednesday. (Average prices, based on 81363785 datapoints.)
We have a lot more statistics for flights BA 7900 and between Singapore and Kuala Lumpur.