I loved NZ when my wife and I had an extended holiday there, travelling by camper van through both islands. So many great things to see and do and such wonderful people.
Your picture reminds me of our aircraft journey to NZ in the early 90s, I think it was the first time I had seen the in-cabin map of the plane's position and route and I found it very interesting. We were due to change flights at Sydney for the connecting flight on to Aukland and so flew right across Oz rather than your route through the Southern Ocean. When the map showed the aircraft symbol cross over Australia's Northern coast on the way to Sydney I started to get ready for landing. I didn't quite appreciate the size of Australia and we had another four hours or so of flying across the Outback until we would land !
Have a great time in NZ and keep safe.