| Grado to Octeville | 479.58 mi (771.81 km) |
| Grado to Oignies | 648.98 mi (1,044.43 km) |
| Grado to Oissel | 534.22 mi (859.75 km) |
| Grado to Olivet | 493.62 mi (794.41 km) |
| Grado to Ollioules | 599.51 mi (964.81 km) |
| Grado to Olonne-sur-Mer | 302.43 mi (486.71 km) |
| Grado to Oloron-Sainte-Marie | 275.22 mi (442.92 km) |
| Grado to Onet Village | 436.70 mi (702.81 km) |
| Grado to Onnaing | 664.13 mi (1,068.81 km) |
| Grado to Orange | 545.14 mi (877.31 km) |
| Grado to Orchies | 657.04 mi (1,057.40 km) |
| Grado to Orleans | 495.50 mi (797.44 km) |
| Grado to Orly | 548.64 mi (882.95 km) |
| Grado to Ormesson-sur-Marne | 555.61 mi (894.16 km) |
| Grado to Orsay | 539.40 mi (868.09 km) |
