Flight Penang International Airport departs from Penang Penang International Airport at 18:00 and arrives at Singapore Changi Airport at 19:25.
The flighttime is about 1h 25m. The distance travelled ("as the bird flies"): 423 Km. So the average speed is roughly 299 Km.
The best day to arrive at Penang is Friday and it would be best to avoid Sunday, as prices are on average 173.82% higher than on Friday. (Average prices, based on 2196816 datapoints.)
We have a lot more statistics for flights SQ 137 and between Penang and Singapore.