| Elk River to Opwijk | 4,178.76 mi (6,725.06 km) |
| Elk River to Ostend | 4,123.99 mi (6,636.92 km) |
| Elk River to Oud-Heverlee | 4,201.13 mi (6,761.06 km) |
| Elk River to Oud-Turnhout | 4,191.92 mi (6,746.24 km) |
| Elk River to Oudenaarde | 4,163.19 mi (6,700.01 km) |
| Elk River to Oudenburg | 4,128.54 mi (6,644.25 km) |
| Elk River to Oupeye | 4,240.25 mi (6,824.02 km) |
| Elk River to Overijse | 4,198.57 mi (6,756.94 km) |
| Elk River to Overpelt | 4,211.01 mi (6,776.97 km) |
| Elk River to Paal | 4,210.06 mi (6,775.43 km) |
| Elk River to Peer | 4,215.81 mi (6,784.69 km) |
| Elk River to Pepinster | 4,252.26 mi (6,843.35 km) |
| Elk River to Peruwelz | 4,176.34 mi (6,721.17 km) |
| Elk River to Perwez | 4,215.04 mi (6,783.45 km) |
| Elk River to Philippeville | 4,223.54 mi (6,797.13 km) |
