Flight Lukou Airport departs from Nanjing Lukou Airport at 20:45 and arrives at Chongqing Chongqing Jiangbei International Airport at 23:30.
The flighttime is about 3h 45m. The distance travelled ("as the bird flies"): 1361 Km. So the average speed is roughly 363 Km.
There is an 1 hour time difference between Nanjing and Chongqing