Hong Kong airport's on-time performance falls to 63pc
Chek Lap Kok result down from 76pc, giving it ranking of 29th out of 35 major international airports, and Cathay only on time 70pc of time
The number of flights departing on time from Hong Kong has fallen from more than three-quarters to just under two-thirds since the start of the year, according to new statistics.
Global data tracker FlightStats said the Chek Lap Kok airport - often rated the best in the world - now ranks only 29th out of 35 major international airports in terms of on-time performance.
Only 63.7 per cent of flights departed on time last month, down from 76.8 per cent in January, when the airport ranked 22nd internationally and 11th in Asia, FlightStats said.
It now ranks 15th among 35 Asian airports, with the Osaka International Airport topping the list with a 95.9 per cent on-time performance.
The Airport Authority Hong Kong would not say whether it was dissatisfied with the result, but pointed out that the number of flight movements reached 352,000 last year, a figure that had not been projected to be achieved until 2015.
A spokesman said the authority would finish building 28 more parking stands next year, and another 20 in 2015.
"We hope that this will speed up the flight movements," he said, adding there were 145 stands at present.
Of flights delayed at Chek Lap Kok last month, 15.8 per cent were for 15 to 29 minutes; 7.3 per cent for 30 to 44 minutes; and 13.3 per cent for 45 minutes or longer.
More than 12,417 flight movements were calculated in the FlightStats study.
A Civil Aviation Department spokeswoman said the department was consistently working on improving air traffic handling efficiency by implementation of systems such as automatic arrival sequencing.
The number of air traffic controllers has gone up from 148 in 2010 to 158 last year, which is sufficient, she added.
Separately, on-time performance for Cathay Pacific and Dragonair were 70 per cent and 58.4 respectively last month, according to the study. They ranked 24 and 32 respectively among 40 Asian airlines.
A Cathay spokeswoman said the FlightStats figures in the past few months were "consistently lower than that in our record".
The airline would continue to enhance co-operation with various stakeholders to ensure capacity kept up with demand, she said.