| Allentown to Opwijk | 3,713.77 mi (5,976.74 km) |
| Allentown to Ostend | 3,656.20 mi (5,884.08 km) |
| Allentown to Oud-Heverlee | 3,736.76 mi (6,013.73 km) |
| Allentown to Oud-Turnhout | 3,736.70 mi (6,013.64 km) |
| Allentown to Oudenaarde | 3,693.23 mi (5,943.68 km) |
| Allentown to Oudenburg | 3,660.51 mi (5,891.02 km) |
| Allentown to Oupeye | 3,779.43 mi (6,082.40 km) |
| Allentown to Overijse | 3,732.70 mi (6,007.20 km) |
| Allentown to Overpelt | 3,756.66 mi (6,045.76 km) |
| Allentown to Paal | 3,751.63 mi (6,037.67 km) |
| Allentown to Peer | 3,760.37 mi (6,051.74 km) |
| Allentown to Pepinster | 3,790.28 mi (6,099.87 km) |
| Allentown to Peruwelz | 3,701.17 mi (5,956.46 km) |
| Allentown to Perwez | 3,748.31 mi (6,032.32 km) |
| Allentown to Philippeville | 3,748.91 mi (6,033.29 km) |
