| Robertsville to Orbetello | 4,232.43 mi (6,811.43 km) |
| Robertsville to Oria | 4,585.39 mi (7,379.47 km) |
| Robertsville to Oristano | 4,201.65 mi (6,761.91 km) |
| Robertsville to Orta Nova | 4,469.99 mi (7,193.75 km) |
| Robertsville to Orte | 4,283.41 mi (6,893.48 km) |
| Robertsville to Ortona | 4,375.42 mi (7,041.56 km) |
| Robertsville to Orvieto | 4,262.30 mi (6,859.51 km) |
| Robertsville to Orzinuovi | 4,077.89 mi (6,562.73 km) |
| Robertsville to Osimo | 4,295.32 mi (6,912.66 km) |
| Robertsville to Ospitaletto | 4,078.89 mi (6,564.34 km) |
| Robertsville to Ostuni | 4,574.27 mi (7,361.57 km) |
| Robertsville to Ottaviano | 4,433.47 mi (7,134.98 km) |
| Robertsville to Ovada | 4,046.65 mi (6,512.46 km) |
| Robertsville to Ozieri | 4,197.10 mi (6,754.58 km) |
| Robertsville to Paceco | 4,452.38 mi (7,165.41 km) |
