| Aguas Santas to Orbetello | 1,020.75 mi (1,642.74 km) |
| Aguas Santas to Oria | 1,366.06 mi (2,198.46 km) |
| Aguas Santas to Oristano | 904.87 mi (1,456.25 km) |
| Aguas Santas to Orta Nova | 1,257.82 mi (2,024.27 km) |
| Aguas Santas to Orte | 1,080.48 mi (1,738.86 km) |
| Aguas Santas to Ortona | 1,183.49 mi (1,904.64 km) |
| Aguas Santas to Orvieto | 1,065.85 mi (1,715.31 km) |
| Aguas Santas to Orzinuovi | 972.73 mi (1,565.46 km) |
| Aguas Santas to Osimo | 1,134.64 mi (1,826.02 km) |
| Aguas Santas to Ospitaletto | 981.43 mi (1,579.46 km) |
| Aguas Santas to Ostuni | 1,360.59 mi (2,189.65 km) |
| Aguas Santas to Ottaviano | 1,198.99 mi (1,929.60 km) |
| Aguas Santas to Ovada | 901.71 mi (1,451.16 km) |
| Aguas Santas to Ozieri | 918.23 mi (1,477.75 km) |
| Aguas Santas to Paceco | 1,144.29 mi (1,841.56 km) |
