Delays at Sydney Airport have impacted more than 150 flights. (Steven Markham/AAP PHOTOS)Delays at Sydney Airport have impacted more than 150 flights. More than 150 flights passing through Sydney airport have been affected, including 95 across the Qantas network, as the airport struggles with staffing shortages. Mr Beckett called on Airservices Australia to identify the root cause of the issue and detail plans to address it. Airservices Australia has previously said air traffic controllers are dedicated to performing a demanding role.