| Castelli Calepio to Octeville | 603.28 mi (970.89 km) |
| Castelli Calepio to Oignies | 461.56 mi (742.81 km) |
| Castelli Calepio to Oissel | 484.10 mi (779.08 km) |
| Castelli Calepio to Olivet | 408.62 mi (657.62 km) |
| Castelli Calepio to Ollioules | 264.03 mi (424.91 km) |
| Castelli Calepio to Olonne-sur-Mer | 562.34 mi (904.99 km) |
| Castelli Calepio to Oloron-Sainte-Marie | 544.76 mi (876.70 km) |
| Castelli Calepio to Onet Village | 367.41 mi (591.29 km) |
| Castelli Calepio to Onnaing | 438.74 mi (706.08 km) |
| Castelli Calepio to Orange | 269.69 mi (434.02 km) |
| Castelli Calepio to Orchies | 453.94 mi (730.55 km) |
| Castelli Calepio to Orleans | 409.14 mi (658.45 km) |
| Castelli Calepio to Orly | 412.57 mi (663.97 km) |
| Castelli Calepio to Ormesson-sur-Marne | 408.18 mi (656.90 km) |
| Castelli Calepio to Orsay | 419.35 mi (674.87 km) |
