| Montecatini Terme to Navodari | 884.03 mi (1,422.71 km) |
| Montecatini Terme to Negresti-Oas | 667.03 mi (1,073.49 km) |
| Montecatini Terme to Nehoiu | 769.47 mi (1,238.34 km) |
| Montecatini Terme to Ocna Mures | 660.18 mi (1,062.46 km) |
| Montecatini Terme to Odobesti | 807.65 mi (1,299.78 km) |
| Montecatini Terme to Odorheiu Secuiesc | 727.19 mi (1,170.30 km) |
| Montecatini Terme to Oltenita | 787.65 mi (1,267.60 km) |
| Montecatini Terme to Onesti | 796.25 mi (1,281.44 km) |
| Montecatini Terme to Oradea | 582.74 mi (937.83 km) |
| Montecatini Terme to Orastie | 622.94 mi (1,002.53 km) |
| Montecatini Terme to Oravita | 543.69 mi (874.99 km) |
| Montecatini Terme to Orsova | 577.25 mi (929.00 km) |
| Montecatini Terme to Otelu Rosu | 579.36 mi (932.39 km) |
| Montecatini Terme to Otopeni | 757.89 mi (1,219.70 km) |
| Montecatini Terme to Ovidiu | 881.67 mi (1,418.92 km) |
