| Castres to Oignies | 475.90 mi (765.89 km) |
| Castres to Oissel | 400.53 mi (644.58 km) |
| Castres to Olivet | 295.09 mi (474.90 km) |
| Castres to Ollioules | 183.43 mi (295.20 km) |
| Castres to Olonne-sur-Mer | 282.22 mi (454.19 km) |
| Castres to Oloron-Sainte-Marie | 146.12 mi (235.16 km) |
| Castres to Onet Village | 55.59 mi (89.46 km) |
| Castres to Onnaing | 473.25 mi (761.63 km) |
| Castres to Orange | 132.81 mi (213.73 km) |
| Castres to Orchies | 477.28 mi (768.12 km) |
| Castres to Orleans | 297.73 mi (479.15 km) |
| Castres to Orly | 355.47 mi (572.08 km) |
| Castres to Ormesson-sur-Marne | 358.57 mi (577.06 km) |
| Castres to Orsay | 352.26 mi (566.90 km) |
| Castres to Orthez | 151.48 mi (243.78 km) |
