| Olbernhau to Opwijk | 399.71 mi (643.27 km) |
| Olbernhau to Ostend | 454.60 mi (731.60 km) |
| Olbernhau to Oud-Heverlee | 378.82 mi (609.66 km) |
| Olbernhau to Oud-Turnhout | 365.70 mi (588.54 km) |
| Olbernhau to Oudenaarde | 425.30 mi (684.46 km) |
| Olbernhau to Oudenburg | 451.07 mi (725.93 km) |
| Olbernhau to Oupeye | 336.49 mi (541.53 km) |
| Olbernhau to Overijse | 384.76 mi (619.21 km) |
| Olbernhau to Overpelt | 346.58 mi (557.76 km) |
| Olbernhau to Paal | 356.70 mi (574.06 km) |
| Olbernhau to Peer | 344.70 mi (554.75 km) |
| Olbernhau to Pepinster | 329.46 mi (530.21 km) |
| Olbernhau to Peruwelz | 427.48 mi (687.97 km) |
| Olbernhau to Perwez | 373.02 mi (600.32 km) |
| Olbernhau to Philippeville | 387.67 mi (623.90 km) |
