| Grootegast to Opwijk | 179.19 mi (288.38 km) |
| Grootegast to Ostend | 197.94 mi (318.55 km) |
| Grootegast to Oud-Heverlee | 178.43 mi (287.16 km) |
| Grootegast to Oud-Turnhout | 142.32 mi (229.03 km) |
| Grootegast to Oudenaarde | 199.34 mi (320.81 km) |
| Grootegast to Oudenburg | 197.62 mi (318.05 km) |
| Grootegast to Oupeye | 175.44 mi (282.35 km) |
| Grootegast to Overijse | 183.86 mi (295.89 km) |
| Grootegast to Overpelt | 142.97 mi (230.09 km) |
| Grootegast to Paal | 157.65 mi (253.71 km) |
| Grootegast to Peer | 148.21 mi (238.52 km) |
| Grootegast to Pepinster | 184.17 mi (296.40 km) |
| Grootegast to Peruwelz | 219.22 mi (352.79 km) |
| Grootegast to Perwez | 189.73 mi (305.35 km) |
| Grootegast to Philippeville | 221.23 mi (356.04 km) |
