Cummings has scored six times this season, contributing to a 14-goal haul since returning to Scotland last January from Shrewsbury.
He said: “Jason is booked for a flight on Saturday.
“We wish him all the best, he helped us get promoted and I hope he does well out in Australia.
“I hope he goes there, shows the type of player he can be when things are right and scores goals."
The charismatic forward scored 69 times at Hibs where he began his senior career and has also had spells at Rangers, Luton Town and Peterborough United, on loan from Nottingham Forest.