The calculated distance (air line) between Castel San Pietro Terme and Sant'Agata Bolognese is approximately 29 miles respectively 46 kilometers.
By car or train, the actual journey to Sant'Agata Bolognese is certainly longer, as only the direct route (as the crow flies) between Castel San Pietro Terme and Sant'Agata Bolognese has been calculated here.
Air line (approximately)
46 kilometers
25 nautical miles