| West Allis to Opwijk | 4,090.30 mi (6,582.70 km) |
| West Allis to Ostend | 4,034.14 mi (6,492.31 km) |
| West Allis to Oud-Heverlee | 4,113.06 mi (6,619.32 km) |
| West Allis to Oud-Turnhout | 4,106.99 mi (6,609.57 km) |
| West Allis to Oudenaarde | 4,072.87 mi (6,554.65 km) |
| West Allis to Oudenburg | 4,038.64 mi (6,499.56 km) |
| West Allis to Oupeye | 4,153.72 mi (6,684.76 km) |
| West Allis to Overijse | 4,109.95 mi (6,614.33 km) |
| West Allis to Overpelt | 4,126.53 mi (6,641.02 km) |
| West Allis to Paal | 4,124.14 mi (6,637.17 km) |
| West Allis to Peer | 4,130.99 mi (6,648.18 km) |
| West Allis to Pepinster | 4,165.41 mi (6,703.57 km) |
| West Allis to Peruwelz | 4,084.29 mi (6,573.02 km) |
| West Allis to Perwez | 4,126.24 mi (6,640.54 km) |
| West Allis to Philippeville | 4,132.02 mi (6,649.85 km) |
