Bus from Vienna to Pula, trough out the year there is a scheduled bus line operated between Vienna and Pula, the bus drives via Graz, Maribor, Zagreb and Rijeka. The bus has a travel time of about 8 hours. In Vienna the bus departure from VIB bus station or the stadioncenter, see the stops here. In Pula the drop off point is the main bus station, which is situated 800 meter from the Amphitheatre and a bit more then 1 km from center of town. In addition to the scheduled bus, there might be touristic buses operating the line during summer season. . If you are planning to travel back to Vienna you should buy a discounted return ticket, you can see timetable for buses in the opposite direction here .