The calculated distance (air line) between Attnang-Puchheim and Sankt Pölten is approximately 89 miles respectively 144 kilometers.
By car or train, the actual journey to Sankt Pölten is certainly longer, as only the direct route (as the crow flies) between Attnang-Puchheim and Sankt Pölten has been calculated here.
Air line (approximately)
144 kilometers
78 nautical miles