| Grigiskes to Opwijk | 906.21 mi (1,458.40 km) |
| Grigiskes to Ostend | 949.15 mi (1,527.50 km) |
| Grigiskes to Oud-Heverlee | 890.97 mi (1,433.88 km) |
| Grigiskes to Oud-Turnhout | 864.70 mi (1,391.60 km) |
| Grigiskes to Oudenaarde | 932.67 mi (1,500.98 km) |
| Grigiskes to Oudenburg | 947.10 mi (1,524.21 km) |
| Grigiskes to Oupeye | 856.26 mi (1,378.01 km) |
| Grigiskes to Overijse | 897.71 mi (1,444.73 km) |
| Grigiskes to Overpelt | 850.31 mi (1,368.44 km) |
| Grigiskes to Paal | 864.99 mi (1,392.07 km) |
| Grigiskes to Peer | 851.22 mi (1,369.91 km) |
| Grigiskes to Pepinster | 853.81 mi (1,374.08 km) |
| Grigiskes to Peruwelz | 943.20 mi (1,517.93 km) |
| Grigiskes to Perwez | 891.38 mi (1,434.54 km) |
| Grigiskes to Philippeville | 915.03 mi (1,472.59 km) |
