Australian Airlines
Sunstate took delivery of 3 additional Dash 8s, placing them in service in mid-1992, and took over more routes from Australian Regional Airlines of Queensland, another Australian Airlines subsidiary operating in Queensland that rose after the demise of Air Queensland. It also commenced operations from Brisbane into New South Wales, flying once a week to Lord Howe Island from 20 September 1992. Both Southern Australia and Sunstate also started using Australian Airlines' 'TN' airline code for all of their services following the purchase.