| Willow Grove to Opwijk | 3,719.20 mi (5,985.48 km) |
| Willow Grove to Ostend | 3,661.59 mi (5,892.76 km) |
| Willow Grove to Oud-Heverlee | 3,742.18 mi (6,022.46 km) |
| Willow Grove to Oud-Turnhout | 3,742.53 mi (6,023.02 km) |
| Willow Grove to Oudenaarde | 3,698.47 mi (5,952.11 km) |
| Willow Grove to Oudenburg | 3,665.89 mi (5,899.67 km) |
| Willow Grove to Oupeye | 3,784.94 mi (6,091.28 km) |
| Willow Grove to Overijse | 3,738.06 mi (6,015.83 km) |
| Willow Grove to Overpelt | 3,762.49 mi (6,055.14 km) |
| Willow Grove to Paal | 3,757.30 mi (6,046.79 km) |
| Willow Grove to Peer | 3,766.15 mi (6,061.04 km) |
| Willow Grove to Pepinster | 3,795.73 mi (6,108.64 km) |
| Willow Grove to Peruwelz | 3,706.17 mi (5,964.50 km) |
| Willow Grove to Perwez | 3,753.61 mi (6,040.85 km) |
| Willow Grove to Philippeville | 3,753.86 mi (6,041.25 km) |
