Sydney Kingsford Smith Airport — colloquially Mascot Airport, Kingsford Smith Airport, or Sydney Airport — is an international airport in Sydney, New South Wales, Australia, located 8 km (5 mi) south of the Sydney central business district, in the suburb of Mascot. The airport is owned by Sydney Airport Holdings. It is the primary airport serving Sydney and is a primary hub for Qantas, as well as a secondary hub for Virgin Australia and Jetstar, and a focus city for Air New Zealand. Situated next to Botany Bay, the airport has three runways. Sydney Kingsford Int'l Airport covers 907 hectares of land.

An international airport is an airport with customs and border control facilities enabling passengers to travel between countries around the world. International airports are usually larger than domestic airports, and feature longer runways and have facilities to accommodate heavier aircraft such as the Boeing 747 and the Airbus A380 commonly used for international and intercontinental travel. International airports often host domestic flights, which helps feed both passengers and cargo into international ones.