| Montecatini Terme to Octeville | 707.72 mi (1,138.96 km) |
| Montecatini Terme to Oignies | 582.88 mi (938.06 km) |
| Montecatini Terme to Oissel | 593.61 mi (955.33 km) |
| Montecatini Terme to Olivet | 507.21 mi (816.27 km) |
| Montecatini Terme to Ollioules | 252.00 mi (405.55 km) |
| Montecatini Terme to Olonne-sur-Mer | 636.73 mi (1,024.72 km) |
| Montecatini Terme to Oloron-Sainte-Marie | 571.40 mi (919.58 km) |
| Montecatini Terme to Onet Village | 406.78 mi (654.65 km) |
| Montecatini Terme to Onnaing | 561.29 mi (903.31 km) |
| Montecatini Terme to Orange | 296.70 mi (477.49 km) |
| Montecatini Terme to Orchies | 575.92 mi (926.85 km) |
| Montecatini Terme to Orleans | 508.19 mi (817.86 km) |
| Montecatini Terme to Orly | 521.65 mi (839.52 km) |
| Montecatini Terme to Ormesson-sur-Marne | 518.14 mi (833.87 km) |
| Montecatini Terme to Orsay | 527.31 mi (848.62 km) |
