The calculated distance (air line) between San Marcellino and Acilia-Castel Fusano-Ostia Antica is approximately 110 miles respectively 176 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 San Marcellino and Acilia-Castel Fusano-Ostia Antica has been calculated here.
Air line (approximately)
176 kilometers
95 nautical miles