Since there have been no news about Permai today I think she would ether leave tonight or early morning tomorrow.
I’m hopeful both zoos will provide updates given Monarto Safari Park previously announced on socials that Burma was at the airport and on her way to Monarto (as oppposed to delaying the announcement until she’d arrived).
The temperatures in Perth and Adelaide indicate leaving early Monday morning and arriving in the afternoon of Tuesday would be favourable, but we will have to wait and see. My prediction is for an update from Perth during business hours of the day of departure that Permai left the building several hours ago; with Monarto providing updates henceforth.