SYDNEY — Sydney Airport passengers faced flight cancellations and delays of more than an hour on Friday after an air traffic controller shortage forced authorities to restrict traffic at Australia’s busiest airport.
A shortage of air traffic controllers caused flight cancellations and delays at Sydney Airport, the federal agency responsible for managing Australia's air traffic said, as probes continue into several recent near-misses at the airport https://t.co/8PZDTKN6Jb
— Reuters (@Reuters) September 11, 2026
Airservices Australia said around 14 inbound flights were cancelled, with additional outbound services also affected after unexpected overnight absenteeism left the Sydney control tower one controller short.
Traffic-flow restrictions were lifted at 8:15 a.m. Sydney time on September 11 after staffing conditions improved, although some knock-on delays continued through the morning before schedules largely recovered in the afternoon.
Sydney Airport flights hit by controller shortage
Airservices Australia Deputy Chief Executive Peter Curran told a Senate aviation hearing that the staffing problem emerged at relatively short notice and could not be fully covered overnight.
Rather than maintain normal flight volumes with fewer controllers, Airservices reduced the number of aircraft moving through Sydney to safely manage demand.
Qantas and Virgin Australia services were among those affected, with reports indicating six cancellations for each airline during the disruption.
Passengers on later flights were also advised to monitor their airline’s live flight status because early delays can affect aircraft rotations, crews and departure slots for hours after airport restrictions are removed.
49 controllers employed but staffing buffer is gone
The numbers revealed at the Senate hearing explain why a single unexpected absence had such an immediate impact.
Airservices employs 49 controllers in Sydney and says 41 are required to meet operational needs. Eight are currently unavailable because of longer-term absences, leaving almost no spare capacity when sickness or other short-notice staffing problems occur.
Curran said Sydney had faced staffing pressure since July and acknowledged there were periods when shortages became particularly difficult to absorb.
103 Sydney cancellations linked to Airservices in a year
Friday’s disruption is part of a broader operational problem.
Australian airports recorded 2,536 flight cancellations in the year to August 31. Of those, 121 were attributed to Airservices Australia, with 103 occurring at Sydney Airport.
That works out to roughly one Airservices-related cancellation across Australia every three days.
Air traffic control failures can also create major ripple effects overseas. Recent disruption saw Heathrow and Gatwick flights hit by a NATS air traffic control fault, causing cancellations and lengthy delays across airline networks.
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Recruitment push aims to reduce future disruption
Australia currently has about 1,100 air traffic controllers, and Curran said another 91 are expected to join during the coming year.
Airservices is aiming to have enough on-call staff by March 2027 to cover two unexpected absences per day. Retired controllers have also been approached about returning to work, although some have declined.
Training replacements takes time because controllers require specialised instruction and endorsements before they can independently fill specific operational positions.
Recent near-misses increase scrutiny at Sydney
The staffing disruption comes while Sydney Airport is already under closer safety scrutiny after six near-miss incidents were reported over roughly a month.
One August incident involved Virgin Australia flight VA555 and Qantas flight QF728. The Virgin aircraft had been cleared for take-off when its crew saw the Qantas aircraft beginning to cross the runway ahead. The take-off was stopped and no injuries were reported.
The Australian Transport Safety Bureau is investigating that incident and other recent events to determine whether there are common safety issues or contributing factors.
Reuters also reported that several controllers working during a July Qantas near-miss had previously been flagged as facing a high risk of fatigue.
However, investigators have not established that staffing shortages or fatigue caused the recent near-misses, and those separate safety investigations remain ongoing.
The heightened attention follows other recent aviation incidents in Australia, including the fatal light-plane crash near Chambers Flat after departure from Archerfield Airport.
Passengers should check flight status before travel
Airservices said Friday’s traffic restrictions were introduced to protect safety by reducing demand when fewer controllers were available.
Passengers travelling through Sydney should continue checking their airline app or official flight-status page before heading to the airport, especially if their aircraft or crew was caught in the morning disruption.
The longer-term focus now remains on staffing resilience. With 49 controllers employed, eight unavailable and 41 needed operationally, Sydney has little room to absorb another unexpected shortage without risking further delays or cancellations.
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