| Herent to Oignies | 79.42 mi (127.82 km) |
| Herent to Oissel | 191.92 mi (308.87 km) |
| Herent to Olivet | 244.42 mi (393.36 km) |
| Herent to Ollioules | 539.60 mi (868.40 km) |
| Herent to Olonne-sur-Mer | 421.02 mi (677.56 km) |
| Herent to Oloron-Sainte-Marie | 587.66 mi (945.75 km) |
| Herent to Onet Village | 462.22 mi (743.87 km) |
| Herent to Onnaing | 59.16 mi (95.21 km) |
| Herent to Orange | 467.79 mi (752.84 km) |
| Herent to Orchies | 69.24 mi (111.43 km) |
| Herent to Orleans | 241.91 mi (389.32 km) |
| Herent to Orly | 180.72 mi (290.84 km) |
| Herent to Ormesson-sur-Marne | 174.70 mi (281.16 km) |
| Herent to Orsay | 188.60 mi (303.52 km) |
| Herent to Orthez | 572.41 mi (921.20 km) |
