Melbourne Airport (IATA: MEL, ICAO: YMML), known locally as Tullamarine Airport, is an international airport serving Melbourne, Victoria, Australia. Operating 24 hours a day with on-site parking, shopping and dining, Melbourne Airport is the second-busiest airport in Australia measured by passenger movements. Established in 1970, replacing Essendon Airport, Melbourne Airport is the main and sole international airport serving Victoria.

The airport comprises four terminals: one international terminal, two domestic terminals and one budget domestic terminal. It is 18 kilometres (11 miles) northwest of the city centre, adjacent to the suburb of Tullamarine. The airport has its own suburb with its own postcode — Melbourne Airport, Victoria, 3045 respectively. The facility presently covers 2,741 hectares (6,773 acres) of airport property, making MEL among the largest airports in Australia in terms of land area.

In FY June 2024, around 24 million domestic passengers and 11 million international passengers used the airport. The airport features direct flights to 33 domestic destinations and to destinations in the Pacific, Europe, Asia, North America and South America. Melbourne Airport is the number one arrival/departure point for the airports of four of Australia's seven other capital cities.