Flight Melbourne Airport departs from Melbourne Melbourne Airport at 21:10 and arrives at Chengdu Chengdu Shuangliu International Airport at 06:15.
The flighttime is about 12h 05m. The distance travelled ("as the bird flies"): 5648 Km. So the average speed is roughly 467 Km.
There is an 3 hour time difference between Melbourne and Chengdu