Originally Posted by
anabolism
With SYD-MEL-PER as the only intra-Australia flights, why not SYD-PER? It's a much nicer flight in J than the two short ones. However, SYD-HKG is a nicer and longer flight than PER-HKG, and you can't fly SYD-PER-SYD.
warakorn wants to visit MEL from post 2874

Trans AU (PER) from east coast CBR and BNE are other options, plus ADL all subject to flights post Covid-19 and the OW rule for the long AU flights.
Depending on the time of year (month)
warakorn is in Australia could see more of the country, and not just the 3 big cities.