| Civitavecchia to Octeville | 827.84 mi (1,332.27 km) |
| Civitavecchia to Oignies | 713.91 mi (1,148.93 km) |
| Civitavecchia to Oissel | 717.86 mi (1,155.29 km) |
| Civitavecchia to Olivet | 625.77 mi (1,007.07 km) |
| Civitavecchia to Ollioules | 311.00 mi (500.51 km) |
| Civitavecchia to Olonne-sur-Mer | 736.37 mi (1,185.07 km) |
| Civitavecchia to Oloron-Sainte-Marie | 634.44 mi (1,021.03 km) |
| Civitavecchia to Onet Village | 488.84 mi (786.72 km) |
| Civitavecchia to Onnaing | 692.98 mi (1,115.25 km) |
| Civitavecchia to Orange | 379.48 mi (610.71 km) |
| Civitavecchia to Orchies | 707.29 mi (1,138.28 km) |
| Civitavecchia to Orleans | 627.02 mi (1,009.09 km) |
| Civitavecchia to Orly | 646.26 mi (1,040.06 km) |
| Civitavecchia to Ormesson-sur-Marne | 643.29 mi (1,035.27 km) |
| Civitavecchia to Orsay | 651.21 mi (1,048.02 km) |
