Thanks very much for the replies.
Just so I have it absolutely correct (I've revisited the UA site with the benefit of your answers):
- with 20K UA miles, they could redeem a return Y on an NZ Trans-Tasman flight
- can be NZ flight number (and cannot be UA flight number), and could be MEL-AKL, or MEL-WLG, or MEL-CHC return?
Ta.