Sydney Kingsford Smith Airport is the main airport serving Sydney, Australia and is located in the suburb of Mascot in New South Wales. The airport is the oldest continuously operating commercial airport in the world and is named in honour of the Australian World War I aviator, Sir Charles Kingsford Smith. It is the busiest airport in Australia, with more than 45 million passengers travelling through it each year.

The airport was originally opened in 1920 as the first airport in Australia for commercial air services and was initially known as Mascot Aerodrome. In 1935, it was renamed after Kingsford Smith, who had made the first trans-Pacific flight from the United States to Australia in 1928. The airport has been continually developed since then and now serves as a hub for international and domestic flights.

The airport code for Sydney Kingsford Smith Airport is SYD, which is derived from its location in Sydney. The code is used by airlines for their flight plans and for the airport's online booking system.

Sydney Kingsford Smith Airport is served by more than 70 airlines, including major international carriers such as Qantas, Virgin Australia, Emirates, Singapore Airlines, Air New Zealand, and Cathay Pacific. It has more than 500 flights daily, with more than 400 of them international. The airport offers direct flights to more than 80 destinations, including major cities in Asia, Europe, the Middle East, the United States, and the Pacific Islands.

The airport is also home to a number of other facilities, such as a retail precinct, a hotel, and a transport hub. The Sydney Airport Railway Station links the airport to the city centre and other suburbs, making it easy for passengers to get to their destination.

Sydney Kingsford Smith Airport is widely considered to be one of the best airports in the world, and it is consistently voted one of the top three airports in Australia. It is also one of the most popular airports for business and leisure travellers, due to its convenient location and excellent facilities. The airport is a major contributor to the local economy, providing jobs for thousands of people and generating billions of dollars in revenue each year.