| Altenholz to Opwijk | 343.85 mi (553.37 km) |
| Altenholz to Ostend | 372.34 mi (599.23 km) |
| Altenholz to Oud-Heverlee | 336.44 mi (541.44 km) |
| Altenholz to Oud-Turnhout | 302.41 mi (486.69 km) |
| Altenholz to Oudenaarde | 367.49 mi (591.42 km) |
| Altenholz to Oudenburg | 371.49 mi (597.86 km) |
| Altenholz to Oupeye | 317.11 mi (510.33 km) |
| Altenholz to Overijse | 342.86 mi (551.78 km) |
| Altenholz to Overpelt | 295.14 mi (474.98 km) |
| Altenholz to Paal | 311.33 mi (501.04 km) |
| Altenholz to Peer | 298.59 mi (480.54 km) |
| Altenholz to Pepinster | 321.02 mi (516.63 km) |
| Altenholz to Peruwelz | 384.46 mi (618.72 km) |
| Altenholz to Perwez | 343.43 mi (552.69 km) |
| Altenholz to Philippeville | 373.75 mi (601.49 km) |
