Brisbane is actually 934km north of Sydney. However, looking at a map, it is about 180-200km east of Sydney if you drew two vertical lines through each of the cities and measured the gap between.
Sydney, Australia is 34 degrees south, 151 degrees east
The Gold Coast, is in Qld on the NSW border in the far south east corner of the state, approximately 1 hour south of Brisbane, and 9 hours North of Sydney.
They are both far.
The main road link in Australia is the M1. It is made up of the main highways between capital cities such as the Bruce Highway (far north Queensland to Brisbane), the Pacific Highway from Brisbane to Sydney and the Princes Highway which leads from Sydney to Adelaide.
922.32 km by road.
924 km
As you've not indicated which coast in Australia, I'm presuming you mean Sydney, Brisbane, or Melbourne: The flight distance from Dallas/Fort Worth International Airport to Sydney/Melbourne/Brisbane Australia is approximately 13,800 KM or 8,600 miles.
From Sydney to Brisbane via Armidale is a distance of 969 km. Travel time is around 14 hours, without breaks.
A fair distance for two experienced drivers, with regular but fairly short breaks, leaving at about 5am and reaching your destination by about 7:30 at night, is about 1000 km. This is the same as Brisbane to Sydney or Brisbane to Orange.
31 kilometres from Brisbane GPO to Russell Island GPO.
15,206 km
The air distance from Brisbane to Mackay, Australia is 803 km.