The calculated distance (air line) between Acilia-Castel Fusano-Ostia Antica and Rocca Priora is approximately 22 miles respectively 36 kilometers.
By car or train, the actual journey to Rocca Priora is certainly longer, as only the direct route (as the crow flies) between Acilia-Castel Fusano-Ostia Antica and Rocca Priora has been calculated here.
Air line (approximately)
36 kilometers
19 nautical miles