Melbourne Airport (IATA: MEL, ICAO: YMML), known locally as Tullamarine Airport, is the main international airport serving the city of Melbourne, the capital of the Australian state of Victoria. It has Australia's second largest passenger traffic. The airport operates 24/7 and has on-site parking, shopping and dining. The airport opened in 1970 and replaced Essendon Airport. Melbourne Airport is the main international airport of the four airports serving the Melbourne metropolitan area, the other international airport being Avalon Airport.

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 2016–17 around 25 million domestic passengers and 10 million international passengers used the airport.