A single ticket costs 20 ATS and is valid for one hour. During this hour you can travel back and forth if you wish. Single tickets can be bought from the bus or tram driver, and must be made valid by stamping them using
A "strip ticket" for 10 single rides costs 150 ATS. (Note that strip 1 needs to be used first, then strip 2 etc.)
The most convenient ticket for IPCO participants is probably, however, the 1-week ticket (for zone 1) which costs 92 ATS and entitles you to use all buses and trams in Graz for seven consecutive days. This ticket can be bought at many tobacconists and at the ticket counter of the central train station. This ticket is also valid on the train and the bus from the airport to the central train station. The 1-week ticket must be made valid by stamping it in the bus, in the tram or at the train station when it is first being used.)