| Herselt to Oestrich-Winkel | 154.92 mi (249.32 km) |
| Herselt to Offenburg | 224.44 mi (361.20 km) |
| Herselt to Oftersheim | 200.59 mi (322.82 km) |
| Herselt to Ohrdruf | 255.07 mi (410.50 km) |
| Herselt to Ohringen | 241.10 mi (388.01 km) |
| Herselt to Olbernhau | 369.29 mi (594.31 km) |
| Herselt to Olching | 348.64 mi (561.08 km) |
| Herselt to Oldenburg | 202.24 mi (325.47 km) |
| Herselt to Oldenburg in Holstein | 336.85 mi (542.10 km) |
| Herselt to Olfen | 117.23 mi (188.66 km) |
| Herselt to Olpe | 128.19 mi (206.30 km) |
| Herselt to Olsberg | 157.21 mi (253.01 km) |
| Herselt to Oranienburg | 374.83 mi (603.23 km) |
| Herselt to Ortenberg | 188.73 mi (303.73 km) |
| Herselt to Oschatz | 356.47 mi (573.68 km) |
