Soundguy said:
From the AA chart it seems an AU to US return econonomy flight would be 75,000 points. Correct?
Yes, that is correct. 75K for economy, 125K for business class, and 145K for first class.
Soundguy said:
And is that only direct flights eg SYD to LAX return or could one go ADL - SYD - LAX - JFK return also for 75,000 AA points?
The award is valid from any starting point in South Pacific region (Australia, Easter Island, Fiji, French Polynesia New Caledonia, New Zealand, Papua New Guinea, Tonga, and Western Samoa) to any point in North America (USA including Hawaii and Alaska, Canada, Mexico, Bermuda, The Bahamas and The Caribbean) and return.
You must travel directly between the regions and not via another regions, so you cannot use CX via HKG between SP and NA regions.
Soundguy said:
I have the same question regarding the inter country awards. It seems like AU & NZ is regarded as one country (fair enough) and that an inter country return economy award flight is 20,000 points. But my confusion is between where and where? The distance does not seem to be defined. If I were to travel ADL to MEL return would this use up the 20,000 AA points? Or can I go ADL - MEL - CHC - AKL return (or something like that) also for the same 20,000 points? In other words does it have to be direct line between two cities or is there a limit on distance / stopovers (obviously there must be at some point)?
Between anywhere in Australia and New Zealand. And does not need to be the most direct route, but you cannot have a stopover along the way - only transit. I just booked BNE-AKL via MEL in both directions for 35,000 miles per ticket in business class.
So yes your routing above would be valid so long as MEL and CHC are transits. Obviously for an award flight you are not earning any miles so the most direct routing or most convenient times are generally the most attractive options. But of course availability is also going to play a key roll in the final routing

. And of course the return does not need to take the same routing as the outward journey.