| Blankenburg to Oestrich-Winkel | 179.00 mi (288.07 km) |
| Blankenburg to Offenburg | 266.20 mi (428.40 km) |
| Blankenburg to Oftersheim | 197.32 mi (317.56 km) |
| Blankenburg to Ohrdruf | 67.56 mi (108.72 km) |
| Blankenburg to Ohringen | 190.48 mi (306.54 km) |
| Blankenburg to Olbernhau | 128.85 mi (207.36 km) |
| Blankenburg to Olching | 248.91 mi (400.58 km) |
| Blankenburg to Oldenburg | 148.52 mi (239.02 km) |
| Blankenburg to Oldenburg in Holstein | 173.09 mi (278.56 km) |
| Blankenburg to Olfen | 153.15 mi (246.47 km) |
| Blankenburg to Olpe | 145.18 mi (233.64 km) |
| Blankenburg to Olsberg | 110.80 mi (178.32 km) |
| Blankenburg to Oranienburg | 116.78 mi (187.94 km) |
| Blankenburg to Ortenberg | 129.39 mi (208.24 km) |
| Blankenburg to Oschatz | 98.30 mi (158.20 km) |
