Flight Xinzheng Airport departs from Zhengzhou Xinzheng Airport at 17:45 and arrives at Chengdu Chengdu Shuangliu International Airport at 20:00.
The flighttime is about 3h 15m. The distance travelled ("as the bird flies"): 1109 Km. So the average speed is roughly 341 Km.
There is an 1 hour time difference between Zhengzhou and Chengdu