| Horstel to Octeville | 441.56 mi (710.62 km) |
| Horstel to Oignies | 234.82 mi (377.90 km) |
| Horstel to Oissel | 349.16 mi (561.93 km) |
| Horstel to Olivet | 396.45 mi (638.03 km) |
| Horstel to Ollioules | 637.84 mi (1,026.50 km) |
| Horstel to Olonne-sur-Mer | 578.30 mi (930.68 km) |
| Horstel to Oloron-Sainte-Marie | 734.11 mi (1,181.44 km) |
| Horstel to Onet Village | 593.71 mi (955.49 km) |
| Horstel to Onnaing | 216.81 mi (348.93 km) |
| Horstel to Orange | 577.92 mi (930.07 km) |
| Horstel to Orchies | 225.57 mi (363.01 km) |
| Horstel to Orleans | 394.10 mi (634.24 km) |
| Horstel to Orly | 334.98 mi (539.10 km) |
| Horstel to Ormesson-sur-Marne | 328.46 mi (528.61 km) |
| Horstel to Orsay | 343.53 mi (552.86 km) |
