| Saarlouis to Opwijk | 160.96 mi (259.04 km) |
| Saarlouis to Ostend | 214.46 mi (345.15 km) |
| Saarlouis to Oud-Heverlee | 139.68 mi (224.80 km) |
| Saarlouis to Oud-Turnhout | 158.64 mi (255.31 km) |
| Saarlouis to Oudenaarde | 175.27 mi (282.06 km) |
| Saarlouis to Oudenburg | 209.91 mi (337.82 km) |
| Saarlouis to Oupeye | 107.98 mi (173.78 km) |
| Saarlouis to Overijse | 141.20 mi (227.24 km) |
| Saarlouis to Overpelt | 143.87 mi (231.54 km) |
| Saarlouis to Paal | 137.96 mi (222.02 km) |
| Saarlouis to Peer | 137.94 mi (222.00 km) |
| Saarlouis to Pepinster | 95.82 mi (154.20 km) |
| Saarlouis to Peruwelz | 163.45 mi (263.05 km) |
| Saarlouis to Perwez | 124.71 mi (200.70 km) |
| Saarlouis to Philippeville | 115.61 mi (186.06 km) |
