| Niles to Oberkirch | 4,365.39 mi (7,025.41 km) |
| Niles to Obernburg am Main | 4,354.27 mi (7,007.52 km) |
| Niles to Obernkirchen | 4,260.55 mi (6,856.70 km) |
| Niles to Oberschleissheim | 4,507.32 mi (7,253.84 km) |
| Niles to Oberstdorf | 4,493.11 mi (7,230.96 km) |
| Niles to Obertraubling | 4,500.22 mi (7,242.41 km) |
| Niles to Obertshausen | 4,334.15 mi (6,975.14 km) |
| Niles to Oberursel | 4,319.47 mi (6,951.51 km) |
| Niles to Ochsenfurt | 4,395.76 mi (7,074.29 km) |
| Niles to Ochsenhausen | 4,453.97 mi (7,167.98 km) |
| Niles to Ochtrup | 4,194.04 mi (6,749.66 km) |
| Niles to Odenthal | 4,234.53 mi (6,814.82 km) |
| Niles to Oelde | 4,242.28 mi (6,827.29 km) |
| Niles to Oelsnitz | 4,441.31 mi (7,147.60 km) |
| Niles to Oer-Erkenschwick | 4,216.91 mi (6,786.46 km) |
