Scrolled through a few years posts of this thread and couldn’t find anything recent.

Departing SYD on this Sunday. United flight leaves at 9:30 AM, seated in Polaris.

How much time will be needed to travel from the CBD to SYD on a Sunday morning? Train, taxi or Uber? How early should I get to the airport prior to departure with only having carryon luggage? Will getting through immigration and security be fairly easy?