Flight Xinzheng Airport departs from Zhengzhou Xinzheng Airport at 12:50 and arrives at Chengdu Chengdu Shuangliu International Airport at 15:15.
The flighttime is about 3h 25m. The distance travelled ("as the bird flies"): 1109 Km. So the average speed is roughly 325 Km.
There is an 1 hour time difference between Zhengzhou and Chengdu