Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Hong Kong to Tauranga as you normally would.
Related info for your journey
Useful info, stats and facts about Hong Kong to Tauranga flights.
If you book a flight to Tauranga from Hong Kong, you will be flying to Tauranga, which is the city’s only airport. Tauranga (TRG) is located 3.0 km from the centre of Tauranga.
These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Hong Kong Intl Airport to Tauranga Airport flight would often be abbreviated as a HKG to TRG flight.