| Mount Vernon to Opwijk | 3,633.31 mi (5,847.24 km) |
| Mount Vernon to Ostend | 3,575.69 mi (5,754.52 km) |
| Mount Vernon to Oud-Heverlee | 3,656.28 mi (5,884.22 km) |
| Mount Vernon to Oud-Turnhout | 3,656.66 mi (5,884.83 km) |
| Mount Vernon to Oudenaarde | 3,612.56 mi (5,813.86 km) |
| Mount Vernon to Oudenburg | 3,579.99 mi (5,761.43 km) |
| Mount Vernon to Oupeye | 3,699.05 mi (5,953.05 km) |
| Mount Vernon to Overijse | 3,652.16 mi (5,877.58 km) |
| Mount Vernon to Overpelt | 3,676.63 mi (5,916.96 km) |
| Mount Vernon to Paal | 3,671.42 mi (5,908.57 km) |
| Mount Vernon to Peer | 3,680.28 mi (5,922.85 km) |
| Mount Vernon to Pepinster | 3,709.84 mi (5,970.41 km) |
| Mount Vernon to Peruwelz | 3,620.25 mi (5,826.23 km) |
| Mount Vernon to Perwez | 3,667.70 mi (5,902.60 km) |
| Mount Vernon to Philippeville | 3,667.94 mi (5,902.98 km) |
