The calculated distance (air line) between Poggio Renatico and Castel San Pietro Terme is approximately 26 miles respectively 42 kilometers.
By car or train, the actual journey to Castel San Pietro Terme is certainly longer, as only the direct route (as the crow flies) between Poggio Renatico and Castel San Pietro Terme has been calculated here.
Air line (approximately)
42 kilometers
22 nautical miles