Flight Shenzhen Bao'an International Airport departs from Shenzhen Shenzhen Bao'an International Airport at 08:30 and arrives at Chengdu Chengdu Shuangliu International Airport at 11:15.
The flighttime is about 3h 45m. The distance travelled ("as the bird flies"): 1131 Km. So the average speed is roughly 302 Km.
There is an 1 hour time difference between Shenzhen and Chengdu