| Calw to Octeville | 472.54 mi (760.48 km) |
| Calw to Oignies | 284.05 mi (457.14 km) |
| Calw to Oissel | 348.73 mi (561.22 km) |
| Calw to Olivet | 319.47 mi (514.14 km) |
| Calw to Ollioules | 409.48 mi (658.99 km) |
| Calw to Olonne-sur-Mer | 511.42 mi (823.04 km) |
| Calw to Oloron-Sainte-Marie | 588.21 mi (946.63 km) |
| Calw to Onet Village | 418.69 mi (673.81 km) |
| Calw to Onnaing | 257.44 mi (414.31 km) |
| Calw to Orange | 367.28 mi (591.09 km) |
| Calw to Orchies | 274.11 mi (441.13 km) |
| Calw to Orleans | 318.50 mi (512.57 km) |
| Calw to Orly | 288.89 mi (464.92 km) |
| Calw to Ormesson-sur-Marne | 282.18 mi (454.12 km) |
| Calw to Orsay | 298.37 mi (480.17 km) |
