The calculated distance (air line) between Castenaso and Sant'Agata Bolognese is approximately 19 miles respectively 31 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 Castenaso and Sant'Agata Bolognese has been calculated here.
Air line (approximately)
31 kilometers
17 nautical miles