In general, when booking your flight to Auckland, May is the cheapest month on average.
Most flyers found that booking flight tickets 54 days in advance of their planned departure date is, on average, the best time to get cheap flights to Auckland.
From most locations, the cheapest day to fly to Auckland is Monday. Most users found that departing on a Saturday was most expensive.
On average you can find the best deals on plane tickets to Auckland when looking for flights with evening departure times.