Sunbury Bus ServiceSunbury Bus Service is a bus operator in Melbourne, Australia. It operates seven routes under contract to Public Transport Victoria. It is a subsidiary of the Donric Group.WWW Official SiteHistorySunbury Bus Service was formed by Richard Baird and Don McKenzie in March 1980 following the purchase of the business of WJ Treweek. It is today part of the Donric Group. In November 2025, It will commence operating services to Canberra as a contractor to FlixBus.FleetAs at February 2023, the fleet consisted of 108 buses and coaches. Operator livery is white with red & black stripes while newer route buses have the PTV livery.