Flight Changi Airport departs from Singapore Changi Airport at 11:15 and arrives at Penang Penang International Airport at 12:50.
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 Sunday and it would be best to avoid Thursday, as prices are on average 88.92% higher than on Sunday. (Average prices, based on 2114171 datapoints.)
We have a lot more statistics for flights FY 3663 and between Singapore and Penang.