I am trying to create a 0.5 route from JNB-SYD. I intended on flying a Lockheed 1649A Starliner that has 24 hours left on it. The maximum range of this plane is 7,194 miles.
According to the game the distance between JNB-SYD is 6,857mi and this aircraft is listed as one of the aircraft capable for this route when you do the basic research.
Other planes that could fly this route are:
Boeing 707-320B
Boeing 747-200
Douglas DC-8-50
Ilyushin Il-62