| Casale Monferrato to Oberkirch | 235.52 mi (379.04 km) |
| Casale Monferrato to Obernburg am Main | 326.70 mi (525.77 km) |
| Casale Monferrato to Obernkirchen | 493.70 mi (794.53 km) |
| Casale Monferrato to Oberschleissheim | 260.81 mi (419.73 km) |
| Casale Monferrato to Oberstdorf | 179.66 mi (289.13 km) |
| Casale Monferrato to Obertraubling | 317.04 mi (510.22 km) |
| Casale Monferrato to Obertshausen | 341.25 mi (549.19 km) |
| Casale Monferrato to Oberursel | 350.28 mi (563.73 km) |
| Casale Monferrato to Ochsenfurt | 320.93 mi (516.49 km) |
| Casale Monferrato to Ochsenhausen | 214.95 mi (345.93 km) |
| Casale Monferrato to Ochtrup | 491.98 mi (791.76 km) |
| Casale Monferrato to Odenthal | 412.25 mi (663.45 km) |
| Casale Monferrato to Oelde | 463.08 mi (745.25 km) |
| Casale Monferrato to Oelsnitz | 403.44 mi (649.27 km) |
| Casale Monferrato to Oer-Erkenschwick | 453.04 mi (729.10 km) |
