Air traffic controller shortage causes cancellations and delays at Sydney Airport

A shortage of air traffic controllers forced Airservices Australia to impose Air Traffic Flow Management measures at Sydney Airport on Friday morning, leading to flight cancellations and delays. The federal agency, which manages Australia's air traffic, said the measures were required "due to roster constraints" and to safely manage aviation demand.

The ATFM measures were lifted at 8:15 a.m. local time (2215 GMT Thursday) after conditions improved, though delays of up to 10 minutes were still expected for the remainder of the morning. Some flights faced delays of more than an hour, and six flights were cancelled.

A spokesperson said "Airservices acknowledges the ATFM measures may have caused some disruptions to airline scheduling, and is working with airlines to reduce delays and the impact on passenger travel as much as possible." The agency added it is taking steps to recruit more air traffic controllers and make it easier to call on additional staff when needed.

The disruptions occurred as Airservices Australia CEO Rob Sharp and other senior executives were due to appear before a Senate committee examining Australia's aviation sector and its ability to deliver reliable and affordable services to regional areas.

Internal records and a call recording showed several air traffic controllers on duty when two Qantas aircraft nearly collided at Sydney Airport in July had been flagged as facing a high risk of fatigue. One shift manager described the staffing situation as "a bit insane."

That July incident was the first of six near-misses at Sydney Airport over the course of approximately one month. The Australian Transport Safety Bureau is investigating the close calls to determine whether they shared common safety issues or contributing factors.

This episode shows how a rostering gap inside a single air navigation service provider can cascade into cancellations and delays at a country's busiest airport within hours, even when the disruption itself is deliberately triggered as a safety measure rather than a failure. Air Traffic Flow Management exists precisely to slow arrivals and departures when controller capacity cannot match demand, so its activation is itself a signal that staffing, not weather or infrastructure, is the binding constraint on the airport's throughput.

The timing sharpens the read: the disruption landed the same day Airservices Australia's CEO and executives were due before a Senate committee on aviation reliability, and it follows a week of reporting on fatigue risk among controllers working during the July near-miss and five subsequent close calls in roughly a month. Whether those events share a common staffing cause is now a question for the Australian Transport Safety Bureau's investigation, not yet a settled fact.

What happens next depends on two separate processes moving on their own timelines: the Senate committee's questioning of Airservices Australia leadership on recruitment and rostering fixes, and the safety bureau's determination of whether the six near-misses trace to shared contributing factors. Airservices Australia has said it is recruiting more controllers and easing access to additional staff, but neither step yet has a stated completion date.