Hong Kong, Aug. 25 -- Air New Zealand (Air NZ) said 83.1% of its flights arrived within 15 minutes of schedule in July, representing an improvement of 6.4 percentage points from 76.7% on-time performance in the same month last year. Read More The improvement was achieved despite time lost due to weather-related delays increasing by 74% in the 31 days. "Compared with July last year, more of our flights arrived on time and we had 246 fewer cancellations, despite dealing with significantly more weather disruption," Air NZ chief operations officer for ground and in-flight, Kate Boyer, said. "We're particularly encouraged to see improvements right across the network. International on-time performance improved by more than nine percentage points,...