| Blankenburg to Obernburg am Main | 156.73 mi (252.24 km) |
| Blankenburg to Obernkirchen | 84.89 mi (136.61 km) |
| Blankenburg to Oberschleissheim | 246.42 mi (396.57 km) |
| Blankenburg to Oberstdorf | 304.55 mi (490.13 km) |
| Blankenburg to Obertraubling | 202.57 mi (326.00 km) |
| Blankenburg to Obertshausen | 151.18 mi (243.30 km) |
| Blankenburg to Oberursel | 151.17 mi (243.28 km) |
| Blankenburg to Ochsenfurt | 153.31 mi (246.73 km) |
| Blankenburg to Ochsenhausen | 261.16 mi (420.29 km) |
| Blankenburg to Ochtrup | 162.91 mi (262.18 km) |
| Blankenburg to Odenthal | 173.85 mi (279.78 km) |
| Blankenburg to Oelde | 120.14 mi (193.35 km) |
| Blankenburg to Oelsnitz | 108.64 mi (174.84 km) |
| Blankenburg to Oer-Erkenschwick | 159.20 mi (256.21 km) |
| Blankenburg to Oerlinghausen | 98.61 mi (158.71 km) |
