Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 00:20 and arrives at Shenzhen Shenzhen Bao'an International Airport at 05:55.
The flighttime is about 4h 35m. The distance travelled ("as the bird flies"): 1341 Km. So the average speed is roughly 293 Km.
There is an 1 hour time difference between Jakarta and Shenzhen