Rex Airlines Pty Ltd is an Australian regional airline based in Mascot, New South Wales. It operates scheduled regional and domestic services. It is Australia's largest regional airline outside the Qantas group's companies and serves all 6 states across Australia. It is the primary subsidiary of Regional Express Holdings.

Ansett Australia was a major Australian airline group, based in Melbourne, Victoria. The airline flew domestically within Australia and from the 1990s to destinations in Asia. After operating for 65 years, the airline was placed into administration in 2001 following a financial collapse and subsequent organised liquidation in 2002, subject to deed of company arrangement. The last flight touched down on 5 March 2002.