| Mulheim-Karlich to Obernburg am Main | 82.14 mi (132.19 km) |
| Mulheim-Karlich to Obernkirchen | 147.54 mi (237.44 km) |
| Mulheim-Karlich to Oberschleissheim | 235.36 mi (378.78 km) |
| Mulheim-Karlich to Oberstdorf | 241.42 mi (388.53 km) |
| Mulheim-Karlich to Obertraubling | 230.74 mi (371.34 km) |
| Mulheim-Karlich to Obertshausen | 63.14 mi (101.62 km) |
| Mulheim-Karlich to Oberursel | 49.40 mi (79.50 km) |
| Mulheim-Karlich to Ochsenfurt | 124.99 mi (201.15 km) |
| Mulheim-Karlich to Ochsenhausen | 194.46 mi (312.96 km) |
| Mulheim-Karlich to Ochtrup | 126.35 mi (203.34 km) |
| Mulheim-Karlich to Odenthal | 47.63 mi (76.66 km) |
| Mulheim-Karlich to Oelde | 103.89 mi (167.20 km) |
| Mulheim-Karlich to Oelsnitz | 205.71 mi (331.05 km) |
| Mulheim-Karlich to Oer-Erkenschwick | 87.38 mi (140.63 km) |
| Mulheim-Karlich to Oerlinghausen | 120.37 mi (193.71 km) |
