Marketplace
Virgin Australia are offering cheap flights to Los Angeles. Dates appear to be Feb, March, May and some June. Fares include bags, meals and seat selection. All flights have 1 small stopover in Australia. Seems the cheap fares are with BYOJet.
Book cheapest using Skyscanner or directly with Virgin for a bit more. Find the cheapest dates using Google Flights.
ex. Auckland - Momondo - Google Flights
ex. Wellington - Momondo - Google Flights
ex. Christchurch - Momondo - Google Flights