| Roermond to Octeville | 352.74 mi (567.69 km) |
| Roermond to Oignies | 139.88 mi (225.11 km) |
| Roermond to Oissel | 251.22 mi (404.31 km) |
| Roermond to Olivet | 294.27 mi (473.58 km) |
| Roermond to Ollioules | 556.97 mi (896.36 km) |
| Roermond to Olonne-sur-Mer | 477.13 mi (767.87 km) |
| Roermond to Oloron-Sainte-Marie | 633.19 mi (1,019.02 km) |
| Roermond to Onet Village | 497.60 mi (800.82 km) |
| Roermond to Onnaing | 118.32 mi (190.41 km) |
| Roermond to Orange | 490.94 mi (790.10 km) |
| Roermond to Orchies | 129.59 mi (208.55 km) |
| Roermond to Orleans | 291.90 mi (469.77 km) |
| Roermond to Orly | 232.87 mi (374.78 km) |
| Roermond to Ormesson-sur-Marne | 226.31 mi (364.22 km) |
| Roermond to Orsay | 241.52 mi (388.69 km) |
