| Sighetu Marmatiei to Orbetello | 723.32 mi (1,164.07 km) |
| Sighetu Marmatiei to Oria | 599.13 mi (964.21 km) |
| Sighetu Marmatiei to Oristano | 939.13 mi (1,511.38 km) |
| Sighetu Marmatiei to Orta Nova | 607.29 mi (977.33 km) |
| Sighetu Marmatiei to Orte | 674.64 mi (1,085.72 km) |
| Sighetu Marmatiei to Ortona | 601.39 mi (967.85 km) |
| Sighetu Marmatiei to Orvieto | 675.06 mi (1,086.41 km) |
| Sighetu Marmatiei to Orzinuovi | 683.50 mi (1,099.99 km) |
| Sighetu Marmatiei to Osimo | 587.97 mi (946.25 km) |
| Sighetu Marmatiei to Ospitaletto | 673.54 mi (1,083.95 km) |
| Sighetu Marmatiei to Ostuni | 586.38 mi (943.69 km) |
| Sighetu Marmatiei to Ottaviano | 673.79 mi (1,084.36 km) |
| Sighetu Marmatiei to Ovada | 761.16 mi (1,224.97 km) |
| Sighetu Marmatiei to Ozieri | 892.18 mi (1,435.83 km) |
| Sighetu Marmatiei to Paceco | 893.13 mi (1,437.35 km) |
