Flight Changi Airport departs from Singapore Changi Airport at 13:15 and arrives at Penang Penang International Airport at 14:40.
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 Singapore is Saturday and it would be best to avoid Sunday, as prices are on average 418.4% higher than on Saturday. (Average prices, based on 2412654 datapoints.)
We have a lot more statistics for flights SQ 136 and between Singapore and Penang.
