| Houma to Opwijk | 4,858.63 mi (7,819.21 km) |
| Houma to Ostend | 4,801.12 mi (7,726.65 km) |
| Houma to Oud-Heverlee | 4,881.62 mi (7,856.21 km) |
| Houma to Oud-Turnhout | 4,880.94 mi (7,855.12 km) |
| Houma to Oudenaarde | 4,838.34 mi (7,786.56 km) |
| Houma to Oudenburg | 4,805.45 mi (7,733.63 km) |
| Houma to Oupeye | 4,924.15 mi (7,924.65 km) |
| Houma to Overijse | 4,877.65 mi (7,849.81 km) |
| Houma to Overpelt | 4,900.88 mi (7,887.20 km) |
| Houma to Paal | 4,896.14 mi (7,879.57 km) |
| Houma to Peer | 4,904.68 mi (7,893.33 km) |
| Houma to Pepinster | 4,935.10 mi (7,942.27 km) |
| Houma to Peruwelz | 4,846.57 mi (7,799.79 km) |
| Houma to Perwez | 4,893.33 mi (7,875.06 km) |
| Houma to Philippeville | 4,894.35 mi (7,876.69 km) |
