This article is from the New Zealand FAQ, by Phil Stuart-Jones and Lin Nah with numerous contributions by others.
Are available in most main and holiday centres. Prices will vary and it
may be worth shopping around. See B5.3.6.
B5.3.9 Flying
Three main options (Air New Zealand, Ansett and Mount Cook) and numerous
smaller airlines including companies offering helicopter transport/tours.
If you have a backpackers card, you can also opt for standby seats at 50%
discount.
Here are some air fares for Christchurch to Auckland one way:
Mt Cook Air/Air NZ cheapest fare is $124
Unlikely to be any left for this summer due to a recent special where you
could book a seat for $149 to anywhere in another island, or $99 to
anywhere within the same island. These turn up from time to time so keep
an eye open.
Air National: $119
Relatively unknown (check the Auckland phone book). Not so much an airline
as a cargo plane with seats. The service cost $99 back in January 1995
(Lin posted something then).
Night flights
Air NZ: $164
Ansett: $168
 
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