| Grand Rapids to Opwijk | 4,003.88 mi (6,443.62 km) |
| Grand Rapids to Ostend | 3,947.40 mi (6,352.73 km) |
| Grand Rapids to Oud-Heverlee | 4,026.71 mi (6,480.36 km) |
| Grand Rapids to Oud-Turnhout | 4,021.53 mi (6,472.02 km) |
| Grand Rapids to Oudenaarde | 3,985.96 mi (6,414.78 km) |
| Grand Rapids to Oudenburg | 3,951.89 mi (6,359.95 km) |
| Grand Rapids to Oupeye | 4,067.74 mi (6,546.39 km) |
| Grand Rapids to Overijse | 4,023.46 mi (6,475.13 km) |
| Grand Rapids to Overpelt | 4,041.16 mi (6,503.63 km) |
| Grand Rapids to Paal | 4,038.38 mi (6,499.14 km) |
| Grand Rapids to Peer | 4,045.51 mi (6,510.63 km) |
| Grand Rapids to Pepinster | 4,079.32 mi (6,565.04 km) |
| Grand Rapids to Peruwelz | 3,996.88 mi (6,432.35 km) |
| Grand Rapids to Perwez | 4,039.67 mi (6,501.22 km) |
| Grand Rapids to Philippeville | 4,044.70 mi (6,509.31 km) |
