Flight Changi Airport departs from Singapore Changi Airport at 14:35 and arrives at Penang Penang International Airport at 15:45.
The flighttime is about 1h 10m. The distance travelled ("as the bird flies"): 423 Km. So the average speed is roughly 363 Km.
The best day to arrive at Singapore is Friday and it would be best to avoid Sunday, as prices are on average 70.35% higher than on Friday. (Average prices, based on 2004767 datapoints.)
We have a lot more statistics for flights TR 424 and between Singapore and Penang.