| Altensteig to Opwijk | 256.76 mi (413.21 km) |
| Altensteig to Ostend | 311.72 mi (501.67 km) |
| Altensteig to Oud-Heverlee | 234.59 mi (377.53 km) |
| Altensteig to Oud-Turnhout | 247.94 mi (399.03 km) |
| Altensteig to Oudenaarde | 272.75 mi (438.95 km) |
| Altensteig to Oudenburg | 307.19 mi (494.38 km) |
| Altensteig to Oupeye | 197.58 mi (317.97 km) |
| Altensteig to Overijse | 236.93 mi (381.30 km) |
| Altensteig to Overpelt | 230.51 mi (370.97 km) |
| Altensteig to Paal | 228.28 mi (367.38 km) |
| Altensteig to Peer | 225.02 mi (362.14 km) |
| Altensteig to Pepinster | 185.24 mi (298.11 km) |
| Altensteig to Peruwelz | 261.55 mi (420.92 km) |
| Altensteig to Perwez | 220.44 mi (354.77 km) |
| Altensteig to Philippeville | 213.68 mi (343.88 km) |
