Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 08:45 and arrives at Solo Adisumarmo International Airport at 10:00.
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 Wednesday and it would be best to avoid Monday, as prices are on average 143.44% higher than on Wednesday. (Average prices, based on 120827458 datapoints.)
We have a lot more statistics for flights SQ 222 and between Jakarta and Solo.