Thanks for that. I think though I have the whole concept wrong (as just highlighted by 'Jacques Vert'). I have been estimating mileage on Great Circle Mapper by inputting Origin and Destination (Mel-Amm). However, apparently as there is no direct flight for this route I should have been putting in the separate sectors to get there........Is that correct?Far stretch if you don't go all the way around the globe. I think your best bet will be something like the below, at least the long flights are covered..
mel-doh-fco-doh-syd-scl-syd-mel
-Melb to Europe via DOH
-Get surface flights around
-Head back to syd or Auckland via doh
-Get a short flight to Melb
-then you take off again from syd to SCL on second trip.
This is one way. I'm sure others will have another.
I should also have stressed that I need to go to Amman, Casablance and London, hence those flights.