Alaska Airlines Mileage Plan how one think which beats other programs, free stopover during Your reward trip. You can stay 1 day or more at city during your reward trip.
For example You can do
Aucland-Perth stepover-JFK for just 55000 Miles in Business or 40000 Economy.You can fly via NAN (Fiji) with stop where also for 55000 Miles but it’s hard to find Business seats on NAN-SFO/LAX route.
You can also fly Qantas I could even find First Class seat on MEL-LAX Qantas 93 service and You need 70000 miles.
It’s possible also fly American Airlines First Class for 70000 Miles but I couldn’t found availability between Australia and West Coast in First.