If you drive your own personal vehicle it will take about an hour and 15 mins on average during peak times (weekends) and 50 min off-peak. If you don't have a car, you can travel by bus or by ferry from Hobart to Bruny Island. The Kettering Ferry Terminal connects travellers with the 20-minute vehicular ferry which accesses Bruny Island. It's around 35 minutes south of Hobart via Highway 1A at Cooee Bay.