| Langley Park to Opwijk | 3,846.59 mi (6,190.49 km) |
| Langley Park to Ostend | 3,788.98 mi (6,097.77 km) |
| Langley Park to Oud-Heverlee | 3,869.57 mi (6,227.47 km) |
| Langley Park to Oud-Turnhout | 3,869.87 mi (6,227.95 km) |
| Langley Park to Oudenaarde | 3,825.88 mi (6,157.15 km) |
| Langley Park to Oudenburg | 3,793.28 mi (6,104.69 km) |
| Langley Park to Oupeye | 3,912.32 mi (6,296.28 km) |
| Langley Park to Overijse | 3,865.46 mi (6,220.85 km) |
| Langley Park to Overpelt | 3,889.83 mi (6,260.08 km) |
| Langley Park to Paal | 3,884.66 mi (6,251.75 km) |
| Langley Park to Peer | 3,893.50 mi (6,265.98 km) |
| Langley Park to Pepinster | 3,923.12 mi (6,313.65 km) |
| Langley Park to Peruwelz | 3,833.59 mi (6,169.57 km) |
| Langley Park to Perwez | 3,881.01 mi (6,245.88 km) |
| Langley Park to Philippeville | 3,881.29 mi (6,246.33 km) |
