The calculated distance (air line) between Acilia-Castel Fusano-Ostia Antica and Rocca di Papa is approximately 19 miles respectively 31 kilometers.
By car or train, the actual journey to Rocca di Papa is certainly longer, as only the direct route (as the crow flies) between Acilia-Castel Fusano-Ostia Antica and Rocca di Papa has been calculated here.
Air line (approximately)
31 kilometers
17 nautical miles