| Southwick to Orbetello | 793.02 mi (1,276.24 km) |
| Southwick to Oria | 1,114.98 mi (1,794.39 km) |
| Southwick to Oristano | 866.94 mi (1,395.21 km) |
| Southwick to Orta Nova | 1,003.98 mi (1,615.76 km) |
| Southwick to Orte | 830.62 mi (1,336.75 km) |
| Southwick to Ortona | 906.44 mi (1,458.78 km) |
| Southwick to Orvieto | 807.97 mi (1,300.31 km) |
| Southwick to Orzinuovi | 600.11 mi (965.78 km) |
| Southwick to Osimo | 818.58 mi (1,317.37 km) |
| Southwick to Ospitaletto | 598.00 mi (962.39 km) |
| Southwick to Ostuni | 1,101.64 mi (1,772.92 km) |
| Southwick to Ottaviano | 985.42 mi (1,585.88 km) |
| Southwick to Ovada | 594.00 mi (955.94 km) |
| Southwick to Ozieri | 835.51 mi (1,344.62 km) |
| Southwick to Paceco | 1,086.16 mi (1,748.01 km) |
