| Castelnau-le-Lez to Oignies | 473.99 mi (762.81 km) |
| Castelnau-le-Lez to Oissel | 416.15 mi (669.74 km) |
| Castelnau-le-Lez to Olivet | 307.55 mi (494.96 km) |
| Castelnau-le-Lez to Ollioules | 103.53 mi (166.62 km) |
| Castelnau-le-Lez to Olonne-sur-Mer | 341.56 mi (549.68 km) |
| Castelnau-le-Lez to Oloron-Sainte-Marie | 228.31 mi (367.43 km) |
| Castelnau-le-Lez to Onet Village | 82.24 mi (132.35 km) |
| Castelnau-le-Lez to Onnaing | 466.66 mi (751.02 km) |
| Castelnau-le-Lez to Orange | 56.95 mi (91.66 km) |
| Castelnau-le-Lez to Orchies | 473.45 mi (761.95 km) |
| Castelnau-le-Lez to Orleans | 309.95 mi (498.82 km) |
| Castelnau-le-Lez to Orly | 360.15 mi (579.60 km) |
| Castelnau-le-Lez to Ormesson-sur-Marne | 361.66 mi (582.04 km) |
| Castelnau-le-Lez to Orsay | 359.16 mi (578.02 km) |
| Castelnau-le-Lez to Orthez | 234.14 mi (376.81 km) |
