We leave on the 20th of October as well... going to Perth
We won't get there before you though, as we leave from Toronto and going via London and Singapore, with BA and Qantas... don't arrive until 12:30 am on the 23rd... could have taken the slow boat to China and it might have been quicker lol.
Have you got somewhere to stay in Perth??
We have got a house booked in Clarkson (Somerley).... so we are headed NOR for at least now.
Good luck and have a safe flight.