With your ski pass you can use all ski buses in the region for free. Here you find the schedules for the mainseason and the afterseason.
The ski buses to the Shuttleberg and back run every 15 minutes in the mainseason. Here you can download the timetables (main season) of the free ski buses for the area around Flachauwinkl and Kleinarl as a PDF file. The bus schedules are for both directions.