| Olton to Orbetello | 917.72 mi (1,476.93 km) |
| Olton to Oria | 1,232.21 mi (1,983.04 km) |
| Olton to Oristano | 996.32 mi (1,603.43 km) |
| Olton to Orta Nova | 1,122.89 mi (1,807.12 km) |
| Olton to Orte | 953.23 mi (1,534.07 km) |
| Olton to Ortona | 1,025.44 mi (1,650.28 km) |
| Olton to Orvieto | 930.55 mi (1,497.57 km) |
| Olton to Orzinuovi | 719.86 mi (1,158.50 km) |
| Olton to Osimo | 936.36 mi (1,506.92 km) |
| Olton to Ospitaletto | 716.79 mi (1,153.57 km) |
| Olton to Ostuni | 1,218.43 mi (1,960.87 km) |
| Olton to Ottaviano | 1,107.51 mi (1,782.37 km) |
| Olton to Ovada | 718.96 mi (1,157.06 km) |
| Olton to Ozieri | 964.55 mi (1,552.29 km) |
| Olton to Paceco | 1,214.05 mi (1,953.82 km) |
