Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 12:30 and arrives at Makassar Sultan Hasanuddin International Airport at 15:55.
The flighttime is about 2h 25m. The distance travelled ("as the bird flies"): 1434 Km. So the average speed is roughly 593 Km.
There is an 1 hour time difference between Jakarta and Makassar