| Grobbendonk to Ostend | 77.81 mi (125.22 km) |
| Grobbendonk to Oud-Heverlee | 25.43 mi (40.92 km) |
| Grobbendonk to Oud-Turnhout | 14.07 mi (22.64 km) |
| Grobbendonk to Oudenaarde | 54.22 mi (87.26 km) |
| Grobbendonk to Oudenburg | 74.34 mi (119.64 km) |
| Grobbendonk to Oupeye | 52.72 mi (84.85 km) |
| Grobbendonk to Overijse | 29.88 mi (48.08 km) |
| Grobbendonk to Overpelt | 30.32 mi (48.80 km) |
| Grobbendonk to Paal | 22.69 mi (36.51 km) |
| Grobbendonk to Peer | 32.26 mi (51.92 km) |
| Grobbendonk to Pepinster | 64.91 mi (104.47 km) |
| Grobbendonk to Peruwelz | 68.35 mi (110.01 km) |
| Grobbendonk to Perwez | 40.02 mi (64.41 km) |
| Grobbendonk to Philippeville | 69.48 mi (111.81 km) |
| Grobbendonk to Plombieres | 62.61 mi (100.75 km) |
