| Herk-de-Stad to Oestrich-Winkel | 140.50 mi (226.11 km) |
| Herk-de-Stad to Offenburg | 210.91 mi (339.42 km) |
| Herk-de-Stad to Oftersheim | 186.13 mi (299.54 km) |
| Herk-de-Stad to Ohrdruf | 242.67 mi (390.54 km) |
| Herk-de-Stad to Ohringen | 226.63 mi (364.72 km) |
| Herk-de-Stad to Olbernhau | 356.90 mi (574.37 km) |
| Herk-de-Stad to Olching | 334.16 mi (537.79 km) |
| Herk-de-Stad to Oldenburg | 199.81 mi (321.57 km) |
| Herk-de-Stad to Oldenburg in Holstein | 333.52 mi (536.74 km) |
| Herk-de-Stad to Olfen | 109.67 mi (176.50 km) |
| Herk-de-Stad to Olpe | 116.09 mi (186.83 km) |
| Herk-de-Stad to Olsberg | 146.48 mi (235.74 km) |
| Herk-de-Stad to Oranienburg | 366.28 mi (589.48 km) |
| Herk-de-Stad to Ortenberg | 175.04 mi (281.71 km) |
| Herk-de-Stad to Oschatz | 345.07 mi (555.34 km) |
