Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 11:30 and arrives at Solo Adisumarmo International Airport at 12:45.
The flighttime is about 1h 15m. The distance travelled ("as the bird flies"): 458 Km. So the average speed is roughly 366 Km.
The best day to arrive at Jakarta is Saturday and it would be best to avoid Tuesday, as prices are on average 66.5% higher than on Saturday. (Average prices, based on 141847361 datapoints.)
We have a lot more statistics for flights JT 7531 and between Jakarta and Solo.