| South Plainfield to Orbetello | 4,228.94 mi (6,805.83 km) |
| South Plainfield to Oria | 4,581.60 mi (7,373.38 km) |
| South Plainfield to Oristano | 4,199.26 mi (6,758.06 km) |
| South Plainfield to Orta Nova | 4,466.24 mi (7,187.71 km) |
| South Plainfield to Orte | 4,279.77 mi (6,887.63 km) |
| South Plainfield to Ortona | 4,371.56 mi (7,035.34 km) |
| South Plainfield to Orvieto | 4,258.62 mi (6,853.59 km) |
| South Plainfield to Orzinuovi | 4,073.67 mi (6,555.94 km) |
| South Plainfield to Osimo | 4,291.25 mi (6,906.10 km) |
| South Plainfield to Ospitaletto | 4,074.61 mi (6,557.44 km) |
| South Plainfield to Ostuni | 4,570.43 mi (7,355.39 km) |
| South Plainfield to Ottaviano | 4,430.02 mi (7,129.42 km) |
| South Plainfield to Ovada | 4,042.81 mi (6,506.28 km) |
| South Plainfield to Ozieri | 4,194.45 mi (6,750.32 km) |
| South Plainfield to Paceco | 4,450.00 mi (7,161.58 km) |
