| Mogadouro to Orbetello | 923.67 mi (1,486.51 km) |
| Mogadouro to Oria | 1,268.47 mi (2,041.41 km) |
| Mogadouro to Oristano | 807.81 mi (1,300.04 km) |
| Mogadouro to Orta Nova | 1,160.34 mi (1,867.39 km) |
| Mogadouro to Orte | 983.44 mi (1,582.70 km) |
| Mogadouro to Ortona | 1,086.43 mi (1,748.44 km) |
| Mogadouro to Orvieto | 969.00 mi (1,559.46 km) |
| Mogadouro to Orzinuovi | 880.32 mi (1,416.74 km) |
| Mogadouro to Osimo | 1,038.54 mi (1,671.37 km) |
| Mogadouro to Ospitaletto | 889.33 mi (1,431.24 km) |
| Mogadouro to Ostuni | 1,263.02 mi (2,032.64 km) |
| Mogadouro to Ottaviano | 1,101.40 mi (1,772.53 km) |
| Mogadouro to Ovada | 807.98 mi (1,300.32 km) |
| Mogadouro to Ozieri | 820.74 mi (1,320.85 km) |
| Mogadouro to Paceco | 1,048.29 mi (1,687.06 km) |
