Flight Christchurch International Airport departs from Christchurch Christchurch International Airport at 14:50 and arrives at Hong Kong Hong Kong International Airport at 21:30.
The flighttime is about 11h 40m. The distance travelled ("as the bird flies"): 8175 Km. So the average speed is roughly 701 Km.
There is an 5 hour time difference between Christchurch and Hong Kong