| Altstatten to Opwijk | 346.33 mi (557.36 km) |
| Altstatten to Ostend | 399.36 mi (642.71 km) |
| Altstatten to Oud-Heverlee | 324.83 mi (522.77 km) |
| Altstatten to Oud-Turnhout | 340.61 mi (548.15 km) |
| Altstatten to Oudenaarde | 360.04 mi (579.43 km) |
| Altstatten to Oudenburg | 394.80 mi (635.38 km) |
| Altstatten to Oupeye | 289.88 mi (466.52 km) |
| Altstatten to Overijse | 326.54 mi (525.52 km) |
| Altstatten to Overpelt | 323.66 mi (520.89 km) |
| Altstatten to Paal | 320.57 mi (515.90 km) |
| Altstatten to Peer | 318.07 mi (511.88 km) |
| Altstatten to Pepinster | 277.49 mi (446.58 km) |
| Altstatten to Peruwelz | 346.47 mi (557.59 km) |
| Altstatten to Perwez | 310.04 mi (498.96 km) |
| Altstatten to Philippeville | 299.34 mi (481.74 km) |
