The calculated distance (air line) between Sant'Arpino and Acilia-Castel Fusano-Ostia Antica is approximately 114 miles respectively 184 kilometers.
By car or train, the actual journey to Acilia-Castel Fusano-Ostia Antica is certainly longer, as only the direct route (as the crow flies) between Sant'Arpino and Acilia-Castel Fusano-Ostia Antica has been calculated here.
Air line (approximately)
184 kilometers
99 nautical miles