| Osterwieck to Opwijk | 289.47 mi (465.86 km) |
| Osterwieck to Ostend | 338.39 mi (544.58 km) |
| Osterwieck to Oud-Heverlee | 272.20 mi (438.06 km) |
| Osterwieck to Oud-Turnhout | 249.83 mi (402.07 km) |
| Osterwieck to Oudenaarde | 316.13 mi (508.76 km) |
| Osterwieck to Oudenburg | 335.59 mi (540.07 km) |
| Osterwieck to Oupeye | 235.57 mi (379.11 km) |
| Osterwieck to Overijse | 278.84 mi (448.75 km) |
| Osterwieck to Overpelt | 233.27 mi (375.41 km) |
| Osterwieck to Paal | 246.83 mi (397.23 km) |
| Osterwieck to Peer | 233.29 mi (375.45 km) |
| Osterwieck to Pepinster | 232.81 mi (374.67 km) |
| Osterwieck to Peruwelz | 324.25 mi (521.83 km) |
| Osterwieck to Perwez | 271.23 mi (436.51 km) |
| Osterwieck to Philippeville | 294.05 mi (473.23 km) |
