In Reply to: Perth Airport terminals posted by Kenny Larkin on Sunday, 1. March 2009 at 17:33 Bali Time:
There are terminal transfer buses that go around every half hour. Have a look at the Perth Airport website - it gives all the information.
Certain Qantas flights the transfer is free otherwise I think it is about $10.
The domestic and international terminals are about 10km apart by public road (the tarmacs and runways are in between and the terminals opposite each other separated by the runways) so you really need to use the terminal transfer service so you can short going via the highway.