| Neder-Over-Heembeek to Oestrich-Winkel | 170.81 mi (274.90 km) |
| Neder-Over-Heembeek to Offenburg | 231.14 mi (371.99 km) |
| Neder-Over-Heembeek to Oftersheim | 213.93 mi (344.29 km) |
| Neder-Over-Heembeek to Ohrdruf | 276.86 mi (445.56 km) |
| Neder-Over-Heembeek to Ohringen | 255.52 mi (411.22 km) |
| Neder-Over-Heembeek to Olbernhau | 391.07 mi (629.36 km) |
| Neder-Over-Heembeek to Olching | 362.27 mi (583.02 km) |
| Neder-Over-Heembeek to Oldenburg | 224.80 mi (361.78 km) |
| Neder-Over-Heembeek to Oldenburg in Holstein | 359.73 mi (578.94 km) |
| Neder-Over-Heembeek to Olfen | 141.32 mi (227.43 km) |
| Neder-Over-Heembeek to Olpe | 150.35 mi (241.96 km) |
| Neder-Over-Heembeek to Olsberg | 180.47 mi (290.43 km) |
| Neder-Over-Heembeek to Oranienburg | 398.88 mi (641.93 km) |
| Neder-Over-Heembeek to Ortenberg | 208.16 mi (335.00 km) |
| Neder-Over-Heembeek to Oschatz | 379.30 mi (610.42 km) |
