| Montecatini Terme to Oberkirch | 346.01 mi (556.85 km) |
| Montecatini Terme to Obernburg am Main | 418.71 mi (673.85 km) |
| Montecatini Terme to Obernkirchen | 584.22 mi (940.20 km) |
| Montecatini Terme to Oberschleissheim | 304.14 mi (489.47 km) |
| Montecatini Terme to Oberstdorf | 244.84 mi (394.03 km) |
| Montecatini Terme to Obertraubling | 357.42 mi (575.21 km) |
| Montecatini Terme to Obertshausen | 436.88 mi (703.09 km) |
| Montecatini Terme to Oberursel | 448.70 mi (722.12 km) |
| Montecatini Terme to Ochsenfurt | 399.86 mi (643.52 km) |
| Montecatini Terme to Ochsenhausen | 292.14 mi (470.15 km) |
| Montecatini Terme to Ochtrup | 598.17 mi (962.66 km) |
| Montecatini Terme to Odenthal | 522.55 mi (840.96 km) |
| Montecatini Terme to Oelde | 562.51 mi (905.27 km) |
| Montecatini Terme to Oelsnitz | 456.16 mi (734.12 km) |
| Montecatini Terme to Oer-Erkenschwick | 560.33 mi (901.76 km) |
