Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 09:25 and arrives at Padang Minangkabau International Airport at 11:15.
The flighttime is about 1h 50m. The distance travelled ("as the bird flies"): 713 Km. So the average speed is roughly 389 Km.
The best month to arrive at Jakarta is January and the most expensive month to fly is October. (Average prices, based on 377 datapoints.)
We have a lot more statistics for flights KL 148 and between Jakarta and Padang.