| Montecatini Terme to Oria | 421.71 mi (678.68 km) |
| Montecatini Terme to Oristano | 296.74 mi (477.55 km) |
| Montecatini Terme to Orta Nova | 306.85 mi (493.82 km) |
| Montecatini Terme to Orte | 127.60 mi (205.35 km) |
| Montecatini Terme to Ortona | 211.43 mi (340.26 km) |
| Montecatini Terme to Orvieto | 104.92 mi (168.85 km) |
| Montecatini Terme to Orzinuovi | 112.63 mi (181.26 km) |
| Montecatini Terme to Osimo | 138.29 mi (222.56 km) |
| Montecatini Terme to Ospitaletto | 120.53 mi (193.97 km) |
| Montecatini Terme to Ostuni | 410.30 mi (660.31 km) |
| Montecatini Terme to Ottaviano | 282.27 mi (454.27 km) |
| Montecatini Terme to Ovada | 117.40 mi (188.94 km) |
| Montecatini Terme to Ozieri | 245.14 mi (394.51 km) |
| Montecatini Terme to Paceco | 418.03 mi (672.75 km) |
| Montecatini Terme to Pachino | 544.94 mi (877.00 km) |
