Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 18:15 and arrives at Banjarmasin Syamsudin Noor International Airport at 21:10.
The flighttime is about 1h 55m. The distance travelled ("as the bird flies"): 906 Km. So the average speed is roughly 473 Km.
There is an 1 hour time difference between Jakarta and Banjarmasin