At least 100 international and domestic flights out of Sydney Airport were delayed on Friday morning. NewsWire / Flavio BrancaleoneAt least 100 international and domestic flights out of Sydney Airport were delayed on Friday morning. For the second day in a row, the number of flights delayed hit triple figures, with 150 services impacted. On Friday, the major airport saw horrendous delays, which air traffic controllers Airservice Australia said was due to control tower staffing issues. The government-owned corporation “enacted Air Traffic Flow Management measure at Sydney Airport”, “due to operational restrictions to safely manage projected airborne and departure demands”.