| Walnut to Opwijk | 5,590.88 mi (8,997.65 km) |
| Walnut to Ostend | 5,539.08 mi (8,914.28 km) |
| Walnut to Oud-Heverlee | 5,612.31 mi (9,032.14 km) |
| Walnut to Oud-Turnhout | 5,598.36 mi (9,009.69 km) |
| Walnut to Oudenaarde | 5,578.38 mi (8,977.54 km) |
| Walnut to Oudenburg | 5,543.63 mi (8,921.60 km) |
| Walnut to Oupeye | 5,648.44 mi (9,090.28 km) |
| Walnut to Overijse | 5,610.63 mi (9,029.44 km) |
| Walnut to Overpelt | 5,616.44 mi (9,038.79 km) |
| Walnut to Paal | 5,617.76 mi (9,040.91 km) |
| Walnut to Peer | 5,621.70 mi (9,047.25 km) |
| Walnut to Pepinster | 5,660.75 mi (9,110.10 km) |
| Walnut to Peruwelz | 5,593.93 mi (9,002.57 km) |
| Walnut to Perwez | 5,627.13 mi (9,055.99 km) |
| Walnut to Philippeville | 5,639.63 mi (9,076.11 km) |
