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