| Monteriggioni to Oria | 385.67 mi (620.67 km) |
| Monteriggioni to Oristano | 276.82 mi (445.51 km) |
| Monteriggioni to Orta Nova | 270.29 mi (434.99 km) |
| Monteriggioni to Orte | 87.83 mi (141.36 km) |
| Monteriggioni to Ortona | 176.74 mi (284.44 km) |
| Monteriggioni to Orvieto | 65.22 mi (104.96 km) |
| Monteriggioni to Orzinuovi | 152.01 mi (244.64 km) |
| Monteriggioni to Osimo | 113.85 mi (183.22 km) |
| Monteriggioni to Ospitaletto | 159.22 mi (256.25 km) |
| Monteriggioni to Ostuni | 374.80 mi (603.18 km) |
| Monteriggioni to Ottaviano | 242.79 mi (390.73 km) |
| Monteriggioni to Ovada | 153.74 mi (247.42 km) |
| Monteriggioni to Ozieri | 225.26 mi (362.52 km) |
| Monteriggioni to Paceco | 380.70 mi (612.68 km) |
| Monteriggioni to Pachino | 505.22 mi (813.08 km) |
