| Walnut Creek to Opwijk | 5,487.66 mi (8,831.54 km) |
| Walnut Creek to Ostend | 5,438.27 mi (8,752.06 km) |
| Walnut Creek to Oud-Heverlee | 5,508.30 mi (8,864.75 km) |
| Walnut Creek to Oud-Turnhout | 5,491.51 mi (8,837.73 km) |
| Walnut Creek to Oudenaarde | 5,477.27 mi (8,814.81 km) |
| Walnut Creek to Oudenburg | 5,442.78 mi (8,759.31 km) |
| Walnut Creek to Oupeye | 5,542.18 mi (8,919.28 km) |
| Walnut Creek to Overijse | 5,507.19 mi (8,862.97 km) |
| Walnut Creek to Overpelt | 5,508.79 mi (8,865.54 km) |
| Walnut Creek to Paal | 5,511.49 mi (8,869.89 km) |
| Walnut Creek to Peer | 5,514.28 mi (8,874.37 km) |
| Walnut Creek to Pepinster | 5,554.57 mi (8,939.21 km) |
| Walnut Creek to Peruwelz | 5,494.24 mi (8,842.13 km) |
| Walnut Creek to Perwez | 5,523.54 mi (8,889.28 km) |
| Walnut Creek to Philippeville | 5,538.51 mi (8,913.38 km) |
