Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 15:55 and arrives at Pekanbaru Sultan Syarif Kasim II International Airport at 17:45.
The flighttime is about 1h 50m. The distance travelled ("as the bird flies"): 605 Km. So the average speed is roughly 330 Km.
The best month to arrive at Jakarta is February and the most expensive month to fly is December. (Average prices, based on 2005 datapoints.)
We have a lot more statistics for flights IU 3868 and between Jakarta and Pekanbaru.