The calculated distance (air line) between Monte Porzio Catone and Castel Madama is approximately 13 miles respectively 22 kilometers.
By car or train, the actual journey to Castel Madama is certainly longer, as only the direct route (as the crow flies) between Monte Porzio Catone and Castel Madama has been calculated here.
Air line (approximately)
22 kilometers
12 nautical miles