I'll arrive into Perth International (T1) on AirAsia, and would like to make a Qantas flight from the Domestic terminal (T3) 1 hour and 15 minutes later.
I will be travelling with carry on only. I can use the express lane at immigration. I'll do online check-in and go direct to the gate.
… Assuming Air Asia arrives on time, I know it's a ridiculously short layover, but is it possible? Alternatives are a 12 hour layover (and an extra $500 for the flight) or a 25 hour layover (and a hotel nearby over night).
T1 and T3 are two separate buildings 16-20 minutes drive apart.
I don’t like your chances.