| Allouez to Opwijk | 4,021.68 mi (6,472.27 km) |
| Allouez to Ostend | 3,965.82 mi (6,382.37 km) |
| Allouez to Oud-Heverlee | 4,044.36 mi (6,508.77 km) |
| Allouez to Oud-Turnhout | 4,037.52 mi (6,497.76 km) |
| Allouez to Oudenaarde | 4,004.70 mi (6,444.94 km) |
| Allouez to Oudenburg | 3,970.34 mi (6,389.64 km) |
| Allouez to Oupeye | 4,084.67 mi (6,573.64 km) |
| Allouez to Overijse | 4,041.39 mi (6,503.98 km) |
| Allouez to Overpelt | 4,056.97 mi (6,529.06 km) |
| Allouez to Paal | 4,054.92 mi (6,525.77 km) |
| Allouez to Peer | 4,061.51 mi (6,536.36 km) |
| Allouez to Pepinster | 4,096.45 mi (6,592.59 km) |
| Allouez to Peruwelz | 4,016.56 mi (6,464.02 km) |
| Allouez to Perwez | 4,057.73 mi (6,530.29 km) |
| Allouez to Philippeville | 4,064.19 mi (6,540.69 km) |
