| Ronciglione to Octeville | 834.51 mi (1,343.02 km) |
| Ronciglione to Oignies | 714.82 mi (1,150.40 km) |
| Ronciglione to Oissel | 722.76 mi (1,163.18 km) |
| Ronciglione to Olivet | 632.81 mi (1,018.41 km) |
| Ronciglione to Ollioules | 328.47 mi (528.63 km) |
| Ronciglione to Olonne-sur-Mer | 748.78 mi (1,205.04 km) |
| Ronciglione to Oloron-Sainte-Marie | 652.95 mi (1,050.82 km) |
| Ronciglione to Onet Village | 504.05 mi (811.19 km) |
| Ronciglione to Onnaing | 693.29 mi (1,115.75 km) |
| Ronciglione to Orange | 393.99 mi (634.06 km) |
| Ronciglione to Orchies | 707.90 mi (1,139.26 km) |
| Ronciglione to Orleans | 633.97 mi (1,020.28 km) |
| Ronciglione to Orly | 650.95 mi (1,047.60 km) |
| Ronciglione to Ormesson-sur-Marne | 647.72 mi (1,042.41 km) |
| Ronciglione to Orsay | 656.21 mi (1,056.07 km) |
