| Grunheide to Opwijk | 424.60 mi (683.32 km) |
| Grunheide to Ostend | 472.46 mi (760.35 km) |
| Grunheide to Oud-Heverlee | 407.50 mi (655.81 km) |
| Grunheide to Oud-Turnhout | 384.54 mi (618.86 km) |
| Grunheide to Oudenaarde | 451.26 mi (726.23 km) |
| Grunheide to Oudenburg | 469.82 mi (756.10 km) |
| Grunheide to Oupeye | 370.55 mi (596.35 km) |
| Grunheide to Overijse | 414.14 mi (666.49 km) |
| Grunheide to Overpelt | 368.36 mi (592.82 km) |
| Grunheide to Paal | 382.08 mi (614.90 km) |
| Grunheide to Peer | 368.51 mi (593.06 km) |
| Grunheide to Pepinster | 367.31 mi (591.13 km) |
| Grunheide to Peruwelz | 459.55 mi (739.58 km) |
| Grunheide to Perwez | 406.42 mi (654.07 km) |
| Grunheide to Philippeville | 428.60 mi (689.76 km) |
