What are the public transportation options from Auckland International Airport to the city centre?

To travel from Auckland International Airport to the city centre, you have several public transportation options:

• AirportLink Bus: The AirportLink bus operates between Auckland Airport, Puhinui Station, and Manukau Bus Station. It runs every 10 minutes from 4.30am to 12.40am, 7 days a week. You can catch a train to various destinations along the Southern Line and Eastern Line from Puhinui Station. The AirportLink bus departs from bus stop B at the domestic terminal and bus stop A at the international terminal.
• 38 Bus Service: The 38 bus operates between Auckland Airport and Onehunga via Mangere Town Centre. It runs every 15 to 20 minutes, 7 days a week, during the day. The bus stops at the same bus stops as the AirportLink service. You'll need an AT HOP card to use the AirportLink and 38 bus services.

• SkyDrive: SkyDrive offers an express shuttle service between Auckland Airport and SkyCity in Central Auckland. Buses run every 30 minutes, with the first bus leaving the SkyCity bus terminal at 5.00am. Tickets can be purchased from the bus driver (card payment only) or through the SkyDrive website.
• Intercity: Intercity bus passengers can also buy tickets online for their journey to the airport. Visit the Intercity website to book.

For more detailed information on routes, schedules, and ticketing, you can refer to the Auckland Transport website. Please note that the provided information is subject to change, and it's recommended to check the official sources before your travel.