I fly the BNE-CBR route every now and again. On the last flight, (737) I was informed by the captain that our flight path would be BNE-SYD and then CBR (depending on air traffic control). I didn't look out the window to see where we went.

Friends flying DJ, flew BNE-SYD then CBR just as I was informed on the QF flight.

I think it's an air traffic control thing... but don't know why.