| Halstenbek to Obernburg am Main | 263.78 mi (424.51 km) |
| Halstenbek to Obernkirchen | 99.08 mi (159.46 km) |
| Halstenbek to Oberschleissheim | 379.47 mi (610.70 km) |
| Halstenbek to Oberstdorf | 430.45 mi (692.75 km) |
| Halstenbek to Obertraubling | 337.79 mi (543.62 km) |
| Halstenbek to Obertshausen | 250.13 mi (402.54 km) |
| Halstenbek to Oberursel | 243.00 mi (391.06 km) |
| Halstenbek to Ochsenfurt | 275.40 mi (443.22 km) |
| Halstenbek to Ochsenhausen | 384.27 mi (618.43 km) |
| Halstenbek to Ochtrup | 147.94 mi (238.08 km) |
| Halstenbek to Odenthal | 213.19 mi (343.10 km) |
| Halstenbek to Oelde | 143.00 mi (230.14 km) |
| Halstenbek to Oelsnitz | 243.29 mi (391.53 km) |
| Halstenbek to Oer-Erkenschwick | 175.16 mi (281.89 km) |
| Halstenbek to Oerlinghausen | 125.10 mi (201.34 km) |
