| Roy to Opwijk | 5,004.60 mi (8,054.12 km) |
| Roy to Ostend | 4,952.92 mi (7,970.96 km) |
| Roy to Oud-Heverlee | 5,026.00 mi (8,088.56 km) |
| Roy to Oud-Turnhout | 5,011.93 mi (8,065.92 km) |
| Roy to Oudenaarde | 4,992.22 mi (8,034.20 km) |
| Roy to Oudenburg | 4,957.47 mi (7,978.28 km) |
| Roy to Oupeye | 5,062.03 mi (8,146.55 km) |
| Roy to Overijse | 5,024.35 mi (8,085.90 km) |
| Roy to Overpelt | 5,029.99 mi (8,094.99 km) |
| Roy to Paal | 5,031.35 mi (8,097.17 km) |
| Roy to Peer | 5,035.25 mi (8,103.46 km) |
| Roy to Pepinster | 5,074.35 mi (8,166.38 km) |
| Roy to Peruwelz | 5,007.87 mi (8,059.38 km) |
| Roy to Perwez | 5,040.84 mi (8,112.44 km) |
| Roy to Philippeville | 5,053.48 mi (8,132.79 km) |
