Sydney Airport expects to have 65.6 million passengers a year by 2039, up 51 per cent increase from 43.3 million its three terminals handled in 2017.
Sydney Airport chief executive Geoff Culbert says further liberalisation of Australia's air services agreements would unlock demand.
Air Niugini says the loss of a codeshare agreement with Qantas is behind the decision to end Port Moresby-Townsville flights and reduce service to Sydney.
Cebu Pacific has added a second Australian port to its growing international network with the start on nonstop flights to Melbourne Tullamarine.
Adelaide Airport has commenced construction work on its $165 million terminal expansion project which is due to be completed by the end of 2021.
Melbourne Tullamarine is celebrating the best in customer service among the 20,000 people who work at the airport with its annual airport excellence awards.