| Southwater to Orbetello | 805.46 mi (1,296.26 km) |
| Southwater to Oria | 1,126.21 mi (1,812.46 km) |
| Southwater to Oristano | 880.53 mi (1,417.08 km) |
| Southwater to Orta Nova | 1,015.46 mi (1,634.22 km) |
| Southwater to Orte | 842.68 mi (1,356.17 km) |
| Southwater to Ortona | 917.91 mi (1,477.24 km) |
| Southwater to Orvieto | 820.03 mi (1,319.71 km) |
| Southwater to Orzinuovi | 611.62 mi (984.30 km) |
| Southwater to Osimo | 829.83 mi (1,335.49 km) |
| Southwater to Ospitaletto | 609.35 mi (980.65 km) |
| Southwater to Ostuni | 1,112.80 mi (1,790.88 km) |
| Southwater to Ottaviano | 997.42 mi (1,605.19 km) |
| Southwater to Ovada | 606.45 mi (975.99 km) |
| Southwater to Ozieri | 848.94 mi (1,366.24 km) |
| Southwater to Paceco | 1,099.28 mi (1,769.12 km) |
