Originally Posted by
jp12687
NYC-SYD August 4
SYD-MEL Aug 10
MEL-MLE August 14
MLE-DAR August 19
DAR-NYC August 25
also i realize some parts of this will have to be partner flights
You need to lay out the actual routing. Because you are not going nonstop NYC-SYD or DAR-NYC.
Per WineCountryUA, you have too many stops.
You're also going to have too many segments.
And the routing is illegal in numerous respects (although I can't tell exactly because you haven't listed the full routing).
There is just no way you can do that itinerary as a roundtrip using United miles. Have you looked into a RTW (around the world) ticket?