Flight Changi Airport departs from Singapore Changi Airport at 21:20 and arrives at Kuala Lumpur Kuala Lumpur International Airport at 22:25.
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 Monday and it would be best to avoid Friday, as prices are on average 86.36% higher than on Monday. (Average prices, based on 80530702 datapoints.)
We have a lot more statistics for flights AK 720 and between Singapore and Kuala Lumpur.