Wien-Franz Josefs Bahnhof(railway station) via Krems and Spitz to Aggsbach
Westbahn(train) railway station St. Pölten, then via Krems to Aggsbach or Westbahn(train) railway station St. Valentin and via Donauuferbahn(train) to Aggsbach
Bus: Krems-Aggsbach or St Pölten-Melk-Aggsbach-Spitz