| Prato to Octeville | 720.55 mi (1,159.61 km) |
| Prato to Oignies | 592.63 mi (953.74 km) |
| Prato to Oissel | 605.67 mi (974.73 km) |
| Prato to Olivet | 520.48 mi (837.63 km) |
| Prato to Ollioules | 267.95 mi (431.23 km) |
| Prato to Olonne-sur-Mer | 651.92 mi (1,049.16 km) |
| Prato to Oloron-Sainte-Marie | 587.61 mi (945.66 km) |
| Prato to Onet Village | 422.87 mi (680.54 km) |
| Prato to Onnaing | 570.67 mi (918.40 km) |
| Prato to Orange | 312.85 mi (503.48 km) |
| Prato to Orchies | 585.47 mi (942.23 km) |
| Prato to Orleans | 521.42 mi (839.14 km) |
| Prato to Orly | 533.69 mi (858.90 km) |
| Prato to Ormesson-sur-Marne | 530.05 mi (853.03 km) |
| Prato to Orsay | 539.51 mi (868.25 km) |
