Flight Soekarno–Hatta International Airport departs from Jakarta Soekarno–Hatta International Airport at 07:50 and arrives at Guangzhou Guangzhou Baiyun International Airport at 14:10.
The flighttime is about 5h 20m. The distance travelled ("as the bird flies"): 1322 Km. So the average speed is roughly 248 Km.
There is an 1 hour time difference between Jakarta and Guangzhou