Due to multiple factors, expect to potentially pay more when booking in December. For low rates, May can be a great choice for travel to New Zealand. Flights to New Zealand from Ontario in May are about $919 on average during May, but can be found for as low as $671.
To save up to 14% on this flight, we recommend booking at least 50 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Ontario to New Zealand from $976 1-2 weeks out and tickets from $984 for flights departing within the next 72 hours.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to New Zealand as you normally would.