| Grad to Octeville | 837.76 mi (1,348.25 km) |
| Grad to Oignies | 648.80 mi (1,044.15 km) |
| Grad to Oissel | 713.50 mi (1,148.26 km) |
| Grad to Olivet | 667.98 mi (1,075.01 km) |
| Grad to Ollioules | 560.66 mi (902.30 km) |
| Grad to Olonne-sur-Mer | 845.72 mi (1,361.05 km) |
| Grad to Oloron-Sainte-Marie | 851.43 mi (1,370.25 km) |
| Grad to Onet Village | 673.39 mi (1,083.72 km) |
| Grad to Onnaing | 621.78 mi (1,000.65 km) |
| Grad to Orange | 576.42 mi (927.66 km) |
| Grad to Orchies | 638.45 mi (1,027.49 km) |
| Grad to Orleans | 667.64 mi (1,074.47 km) |
| Grad to Orly | 649.55 mi (1,045.35 km) |
| Grad to Ormesson-sur-Marne | 643.32 mi (1,035.33 km) |
| Grad to Orsay | 658.49 mi (1,059.73 km) |
