Was on the LAX-MEL UA98 on 7/11. Departed eventually 1,5 hours late.
First there was a 30 minute delay for a maintenance issue .
When that was fixed after 30 minutes, captain then announced that the luggage for the sydney flight was loaded on our flight (both planes where next to each other). Took another 30 minutes to sort out.
So after 1 hour we were ready for push back but then captain annkunced that the tug would not start. They had to find another one which took about another 30 minutes.
So three different kind of delays on one flight.