| Santa Marinella to Orbetello | 43.02 mi (69.24 km) |
| Santa Marinella to Oria | 318.41 mi (512.42 km) |
| Santa Marinella to Oristano | 224.70 mi (361.62 km) |
| Santa Marinella to Orta Nova | 205.06 mi (330.02 km) |
| Santa Marinella to Orte | 40.28 mi (64.82 km) |
| Santa Marinella to Ortona | 132.35 mi (213.00 km) |
| Santa Marinella to Orvieto | 49.16 mi (79.11 km) |
| Santa Marinella to Orzinuovi | 251.52 mi (404.78 km) |
| Santa Marinella to Osimo | 130.00 mi (209.22 km) |
| Santa Marinella to Ospitaletto | 258.96 mi (416.75 km) |
| Santa Marinella to Ostuni | 310.42 mi (499.58 km) |
| Santa Marinella to Ottaviano | 158.75 mi (255.48 km) |
| Santa Marinella to Ovada | 241.49 mi (388.64 km) |
| Santa Marinella to Ozieri | 178.43 mi (287.16 km) |
| Santa Marinella to Paceco | 282.27 mi (454.26 km) |
