| San Sebastiano al Vesuvio to Orbetello | 197.07 mi (317.15 km) |
| San Sebastiano al Vesuvio to Oria | 172.73 mi (277.98 km) |
| San Sebastiano al Vesuvio to Oristano | 310.62 mi (499.90 km) |
| San Sebastiano al Vesuvio to Orta Nova | 78.01 mi (125.55 km) |
| San Sebastiano al Vesuvio to Orte | 151.96 mi (244.55 km) |
| San Sebastiano al Vesuvio to Ortona | 104.81 mi (168.67 km) |
| San Sebastiano al Vesuvio to Orvieto | 174.57 mi (280.95 km) |
| San Sebastiano al Vesuvio to Orzinuovi | 386.58 mi (622.15 km) |
| San Sebastiano al Vesuvio to Osimo | 188.60 mi (303.52 km) |
| San Sebastiano al Vesuvio to Ospitaletto | 391.29 mi (629.72 km) |
| San Sebastiano al Vesuvio to Ostuni | 168.41 mi (271.04 km) |
| San Sebastiano al Vesuvio to Ottaviano | 5.91 mi (9.50 km) |
| San Sebastiano al Vesuvio to Ovada | 391.51 mi (630.07 km) |
| San Sebastiano al Vesuvio to Ozieri | 281.39 mi (452.85 km) |
| San Sebastiano al Vesuvio to Paceco | 219.49 mi (353.23 km) |
