| Puerto del Rosario to Orbetello | 1,698.07 mi (2,732.78 km) |
| Puerto del Rosario to Oria | 1,962.04 mi (3,157.61 km) |
| Puerto del Rosario to Oristano | 1,499.43 mi (2,413.10 km) |
| Puerto del Rosario to Orta Nova | 1,882.66 mi (3,029.84 km) |
| Puerto del Rosario to Orte | 1,752.64 mi (2,820.61 km) |
| Puerto del Rosario to Ortona | 1,843.86 mi (2,967.41 km) |
| Puerto del Rosario to Orvieto | 1,747.57 mi (2,812.44 km) |
| Puerto del Rosario to Orzinuovi | 1,745.69 mi (2,809.42 km) |
| Puerto del Rosario to Osimo | 1,832.85 mi (2,949.68 km) |
| Puerto del Rosario to Ospitaletto | 1,757.30 mi (2,828.10 km) |
| Puerto del Rosario to Ostuni | 1,963.78 mi (3,160.39 km) |
| Puerto del Rosario to Ottaviano | 1,811.11 mi (2,914.69 km) |
| Puerto del Rosario to Ovada | 1,664.17 mi (2,678.23 km) |
| Puerto del Rosario to Ozieri | 1,539.08 mi (2,476.91 km) |
| Puerto del Rosario to Paceco | 1,653.75 mi (2,661.46 km) |
