Australia’s biggest airport had total passenger traffic of just 92,000 passengers during the month, compared to 3.5 million a year ago.
Of this, only 29,000 international passengers passed through its doors.
May’s decline follows a similar slide in passenger numbers in April. As a result, passenger numbers are down 49.4 percent so far in this financial year.
Australia first barred entry for foreign nationals travelling from mainland China on February 1 in a bid to stem the spread of the coronavirus pandemic.
The incoming travel ban was gradually extended to several countries that became virus hotspots before borders were shut to all non-residents from March 21.