FH5
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5% discount on flights from Australia to North and South America in premium economy & business class (code doesn't work for economy). Should be stackable with the current sales on offer here https://www.airnewzealand.com.au/cheap-flights-to-south-amer… and here https://www.airnewzealand.com.au/cheap-flights-to-north-amer…
I'm not sure what the travel dates are so trial and error. Not a deal for everyone but for those looking to splurge on business, it will save a few $$.