Flight Shenzhen Bao'an International Airport departs from Shenzhen Shenzhen Bao'an International Airport at 07:25 and arrives at Chongqing Chongqing Jiangbei International Airport at 09:50.
The flighttime is about 3h 25m. The distance travelled ("as the bird flies"): 841 Km. So the average speed is roughly 246 Km.
There is an 1 hour time difference between Shenzhen and Chongqing