For a short day trip in J, have you noticed the special to Tasmania announced today, travel until 22-Sep-17. It means you'll have to hurry to book by 23:59 tonight to also incorporated the DSCs. There's no non-stop ADL-HBA flights.
ADL-MEL-HBA $699 one way,  320SCs rtn, $4.37/SC
ADL-SYD-HBA $707 one way,  320SCs rtn, $4.42/SC
MEL-HBA        $549 one way,  160 SCs rtn, $6.86/SC
SYD-HBA        $599 one way,  160SCs rtn,  $7.49/SC
SYD-MEL-HBA $930 one way,  320SCs rtn,  $5.81/SC
PER-MEL-HBA $1399 one way, 480SCs rtn, $5.83/SC