Flight Lukou Airport departs from Nanjing Lukou Airport at 22:20 and arrives at Chongqing Chongqing Jiangbei International Airport at 00:55.
The flighttime is about 3h 35m. The distance travelled ("as the bird flies"): 1361 Km. So the average speed is roughly 380 Km.
There is an 1 hour time difference between Nanjing and Chongqing