| Wheat Ridge to Opwijk | 4,857.36 mi (7,817.16 km) |
| Wheat Ridge to Ostend | 4,803.53 mi (7,730.54 km) |
| Wheat Ridge to Oud-Heverlee | 4,879.45 mi (7,852.71 km) |
| Wheat Ridge to Oud-Turnhout | 4,868.52 mi (7,835.13 km) |
| Wheat Ridge to Oudenaarde | 4,842.85 mi (7,793.82 km) |
| Wheat Ridge to Oudenburg | 4,808.09 mi (7,737.87 km) |
| Wheat Ridge to Oupeye | 4,917.58 mi (7,914.09 km) |
| Wheat Ridge to Overijse | 4,877.19 mi (7,849.09 km) |
| Wheat Ridge to Overpelt | 4,887.30 mi (7,865.34 km) |
| Wheat Ridge to Paal | 4,887.15 mi (7,865.11 km) |
| Wheat Ridge to Peer | 4,892.27 mi (7,873.34 km) |
| Wheat Ridge to Pepinster | 4,929.73 mi (7,933.63 km) |
| Wheat Ridge to Peruwelz | 4,856.87 mi (7,816.38 km) |
| Wheat Ridge to Perwez | 4,893.71 mi (7,875.66 km) |
| Wheat Ridge to Philippeville | 4,903.64 mi (7,891.64 km) |
