| Osterburg to Oberkirch | 334.94 mi (539.04 km) |
| Osterburg to Obernburg am Main | 232.80 mi (374.65 km) |
| Osterburg to Obernkirchen | 116.93 mi (188.18 km) |
| Osterburg to Oberschleissheim | 313.34 mi (504.28 km) |
| Osterburg to Oberstdorf | 377.07 mi (606.83 km) |
| Osterburg to Obertraubling | 264.34 mi (425.41 km) |
| Osterburg to Obertshausen | 226.24 mi (364.09 km) |
| Osterburg to Oberursel | 224.91 mi (361.96 km) |
| Osterburg to Ochsenfurt | 228.63 mi (367.95 km) |
| Osterburg to Ochsenhausen | 335.17 mi (539.41 km) |
| Osterburg to Ochtrup | 196.57 mi (316.35 km) |
| Osterburg to Odenthal | 232.11 mi (373.54 km) |
| Osterburg to Oelde | 166.26 mi (267.58 km) |
| Osterburg to Oelsnitz | 164.41 mi (264.60 km) |
| Osterburg to Oer-Erkenschwick | 206.76 mi (332.74 km) |
