I might think about the train if you will get towards the North shore line. You modify at Wynyard on the airport line, it is pretty straightforward. There are lifts at the two stations and also the vacation from Wynyard is about 25 mins. On the internet BOOKINGS by picking https://sydney-domestic-airport-l20739.frewwebs.com/26686523/the-2-minute-rule-for-sydney-domestic-airport-limousine