| Grevenbroich to Octeville | 376.37 mi (605.71 km) |
| Grevenbroich to Oignies | 162.72 mi (261.87 km) |
| Grevenbroich to Oissel | 271.22 mi (436.48 km) |
| Grevenbroich to Olivet | 306.32 mi (492.98 km) |
| Grevenbroich to Ollioules | 550.31 mi (885.64 km) |
| Grevenbroich to Olonne-sur-Mer | 493.06 mi (793.50 km) |
| Grevenbroich to Oloron-Sainte-Marie | 641.03 mi (1,031.63 km) |
| Grevenbroich to Onet Village | 500.02 mi (804.70 km) |
| Grevenbroich to Onnaing | 139.38 mi (224.31 km) |
| Grevenbroich to Orange | 487.25 mi (784.15 km) |
| Grevenbroich to Orchies | 152.07 mi (244.73 km) |
| Grevenbroich to Orleans | 304.07 mi (489.36 km) |
| Grevenbroich to Orly | 247.04 mi (397.58 km) |
| Grevenbroich to Ormesson-sur-Marne | 240.21 mi (386.59 km) |
| Grevenbroich to Orsay | 256.11 mi (412.16 km) |
