| Riverbank to Orbetello | 6,134.67 mi (9,872.79 km) |
| Riverbank to Oria | 6,430.67 mi (10,349.17 km) |
| Riverbank to Oristano | 6,193.36 mi (9,967.24 km) |
| Riverbank to Orta Nova | 6,328.58 mi (10,184.87 km) |
| Riverbank to Orte | 6,168.25 mi (9,926.84 km) |
| Riverbank to Ortona | 6,232.66 mi (10,030.49 km) |
| Riverbank to Orvieto | 6,145.60 mi (9,890.38 km) |
| Riverbank to Orzinuovi | 5,932.21 mi (9,546.96 km) |
| Riverbank to Osimo | 6,141.81 mi (9,884.29 km) |
| Riverbank to Ospitaletto | 5,927.68 mi (9,539.68 km) |
| Riverbank to Ostuni | 6,415.57 mi (10,324.86 km) |
| Riverbank to Ottaviano | 6,321.05 mi (10,172.75 km) |
| Riverbank to Ovada | 5,936.00 mi (9,553.06 km) |
| Riverbank to Ozieri | 6,169.32 mi (9,928.56 km) |
| Riverbank to Paceco | 6,426.34 mi (10,342.20 km) |
