Flight Changi Airport departs from Singapore Changi Airport at 07:25 and arrives at Penang Penang International Airport at 08:55.
The flighttime is about 1h 30m. The distance travelled ("as the bird flies"): 423 Km. So the average speed is roughly 282 Km.
The best day to arrive at Singapore is Monday and it would be best to avoid Sunday, as prices are on average 269.18% higher than on Monday. (Average prices, based on 2129948 datapoints.)
We have a lot more statistics for flights JQ 671 and between Singapore and Penang.