The 420 bus solutions Sydney Airport, but this doesn’t operate to or from your CBD. The 420 operates as much as Mascot, or Burwood in the other route. You will take a bus from Sydney Airport to Mascot and hook up with town by using educate as we’ve outlined previously https://sydneyairporttaxi08263.wikicorrespondence.com/3990354/what_does_sydney_international_airport_taxi_mean