Hong Kong International Airport (HKIA) handled 5.1 million passengers in May, which represents an 8.9% increase compared with the same period last year.
The increase in passenger traffic was driven by a year-on-year growth in all passenger categories.
Hong Kong resident, transfer/transit and visitor traffic grew by 10%, 9% and 8% respectively, with passenger traffic to/from Taiwan and mainland China recording the most significant increases.
Cargo volume increased 8.3% year-over-year to 367,000t, driven mainly by transshipments, which was up 18% from a year ago.
Flight movements in the month rose 5.3% to 32,700 compared with the same month last year.
Hong Kong Airport Authority chief executive officer Stanley Hui Hon-Chung said: "In recent years, airlines have been adjusting their fleets and replacing old aircraft with newer and quieter models offering higher fuel efficiency and lower emissions.

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By GlobalData"We are also seeing airlines introducing larger aircraft to serve busy routes, particularly on the major inter-continental routes. Supporting this trend, we have been enhancing facilities at HKIA.
"As a result, HKIA is now equipped with a total of six frontal parking stands that can accommodate large wide-bodied aircraft."
In the first five months of 2014, the airport witnessed 6.9% increase in passenger traffic, as well as a 6.1% year-on-year growth in cargo and flights.