Sydney Airport Enforces Nightly Curfew to Limit Aircraft Noise from 11 PM to 6 AM

Sydney Airport enforces a strict curfew from 11 pm to 6 am under the Sydney Airport Curfew Act of 1995 to reduce aircraft noise for nearby residents during nighttime. Most commercial flights are prohibited during these hours, with exceptions for emergency, medical, certain freight, and low-noise aircraft. Pilots must land before the curfew, leading to clustered arrivals near 11 pm and potential diversions if delayed. Similar curfews exist at other Australian airports, regulated by federal authorities to ensure compliance.