| South Valley to Orbetello | 5,804.54 mi (9,341.50 km) |
| South Valley to Oria | 6,133.34 mi (9,870.66 km) |
| South Valley to Oristano | 5,822.64 mi (9,370.63 km) |
| South Valley to Orta Nova | 6,022.81 mi (9,692.77 km) |
| South Valley to Orte | 5,846.83 mi (9,409.56 km) |
| South Valley to Ortona | 5,925.26 mi (9,535.79 km) |
| South Valley to Orvieto | 5,824.36 mi (9,373.39 km) |
| South Valley to Orzinuovi | 5,618.93 mi (9,042.79 km) |
| South Valley to Osimo | 5,837.11 mi (9,393.91 km) |
| South Valley to Ospitaletto | 5,616.73 mi (9,039.26 km) |
| South Valley to Ostuni | 6,119.70 mi (9,848.70 km) |
| South Valley to Ottaviano | 6,001.82 mi (9,659.00 km) |
| South Valley to Ovada | 5,607.16 mi (9,023.86 km) |
| South Valley to Ozieri | 5,807.39 mi (9,346.08 km) |
| South Valley to Paceco | 6,068.66 mi (9,766.56 km) |
