| Montlucon to Obernburg am Main | 386.41 mi (621.87 km) |
| Montlucon to Obernkirchen | 503.31 mi (810.00 km) |
| Montlucon to Oberschleissheim | 439.95 mi (708.03 km) |
| Montlucon to Oberstdorf | 369.83 mi (595.18 km) |
| Montlucon to Obertraubling | 480.22 mi (772.83 km) |
| Montlucon to Obertshausen | 385.22 mi (619.95 km) |
| Montlucon to Oberursel | 382.77 mi (616.01 km) |
| Montlucon to Ochsenfurt | 413.66 mi (665.71 km) |
| Montlucon to Ochsenhausen | 364.75 mi (587.00 km) |
| Montlucon to Ochtrup | 454.71 mi (731.78 km) |
| Montlucon to Odenthal | 383.89 mi (617.82 km) |
| Montlucon to Oelde | 454.69 mi (731.75 km) |
| Montlucon to Oelsnitz | 520.85 mi (838.23 km) |
| Montlucon to Oer-Erkenschwick | 422.37 mi (679.73 km) |
| Montlucon to Oerlinghausen | 475.22 mi (764.79 km) |
