Here's flightstats on the HKG-KIX leg - looks reasonable. 80% ontime, avg delay 35 minutes

http://www.flightstats.com/go/Flight...irportCode=HKG

AI 315 On-time Performance Rating Details
Overall Rating

2.8 of 5
Average On-time:
Avg. Delay: 80%
35 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.8, shows that this flight has on-time performance characteristics better than 54% of all other flights in the FlightStats database.

On-time Performance

3.9 of 5
Good On-time: 80%
This flight has an on-time performance of 80%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 78% of other flights.

Delay Performance

1.7 of 5
Average Avg. Delay: 35 min
This flight has an average delay of 35 minutes with a standard deviation of 59.85 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 34% of other flights.