| Robertsville to Oerlinghausen | 3,829.84 mi (6,163.54 km) |
| Robertsville to Oestrich-Winkel | 3,857.86 mi (6,208.63 km) |
| Robertsville to Offenburg | 3,899.13 mi (6,275.05 km) |
| Robertsville to Oftersheim | 3,899.66 mi (6,275.89 km) |
| Robertsville to Ohrdruf | 3,943.35 mi (6,346.21 km) |
| Robertsville to Ohringen | 3,942.01 mi (6,344.05 km) |
| Robertsville to Olbernhau | 4,050.39 mi (6,518.47 km) |
| Robertsville to Olching | 4,046.87 mi (6,512.80 km) |
| Robertsville to Oldenburg | 3,780.85 mi (6,084.69 km) |
| Robertsville to Oldenburg in Holstein | 3,850.68 mi (6,197.08 km) |
| Robertsville to Olfen | 3,786.13 mi (6,093.18 km) |
| Robertsville to Olpe | 3,822.89 mi (6,152.35 km) |
| Robertsville to Olsberg | 3,839.55 mi (6,179.16 km) |
| Robertsville to Oranienburg | 3,982.86 mi (6,409.79 km) |
| Robertsville to Ortenberg | 3,890.31 mi (6,260.84 km) |
