| Horb am Neckar to Octeville | 474.77 mi (764.07 km) |
| Horb am Neckar to Oignies | 291.49 mi (469.11 km) |
| Horb am Neckar to Oissel | 350.58 mi (564.20 km) |
| Horb am Neckar to Olivet | 315.46 mi (507.68 km) |
| Horb am Neckar to Ollioules | 391.30 mi (629.73 km) |
| Horb am Neckar to Olonne-sur-Mer | 505.57 mi (813.63 km) |
| Horb am Neckar to Oloron-Sainte-Marie | 575.56 mi (926.27 km) |
| Horb am Neckar to Onet Village | 404.54 mi (651.05 km) |
| Horb am Neckar to Onnaing | 265.28 mi (426.93 km) |
| Horb am Neckar to Orange | 350.46 mi (564.00 km) |
| Horb am Neckar to Orchies | 281.85 mi (453.60 km) |
| Horb am Neckar to Orleans | 314.63 mi (506.35 km) |
| Horb am Neckar to Orly | 288.47 mi (464.25 km) |
| Horb am Neckar to Ormesson-sur-Marne | 281.95 mi (453.76 km) |
| Horb am Neckar to Orsay | 297.75 mi (479.19 km) |
