Flight Changi Airport departs from Singapore Changi Airport at 21:50 and arrives at Penang Penang International Airport at 23:25.
The flighttime is about 1h 35m. The distance travelled ("as the bird flies"): 423 Km. So the average speed is roughly 267 Km.
The best day to arrive at Singapore is Monday and it would be best to avoid Friday, as prices are on average 94.95% higher than on Monday. (Average prices, based on 2113197 datapoints.)
We have a lot more statistics for flights FY 3665 and between Singapore and Penang.