Flight Lukou Airport departs from Nanjing Lukou Airport at 15:00 and arrives at Chengdu Chengdu Shuangliu International Airport at 17:40.
The flighttime is about 3h 40m. The distance travelled ("as the bird flies"): 1659 Km. So the average speed is roughly 452 Km.
There is an 1 hour time difference between Nanjing and Chengdu