| Houthulst to Ostend | 17.15 mi (27.61 km) |
| Houthulst to Oud-Heverlee | 75.44 mi (121.40 km) |
| Houthulst to Oud-Turnhout | 91.15 mi (146.69 km) |
| Houthulst to Oudenaarde | 29.65 mi (47.71 km) |
| Houthulst to Oudenburg | 14.33 mi (23.05 km) |
| Houthulst to Oupeye | 118.93 mi (191.41 km) |
| Houthulst to Overijse | 70.30 mi (113.13 km) |
| Houthulst to Overpelt | 108.26 mi (174.23 km) |
| Houthulst to Paal | 96.69 mi (155.62 km) |
| Houthulst to Peer | 109.22 mi (175.78 km) |
| Houthulst to Pepinster | 128.41 mi (206.66 km) |
| Houthulst to Peruwelz | 42.22 mi (67.94 km) |
| Houthulst to Perwez | 85.01 mi (136.81 km) |
| Houthulst to Philippeville | 88.39 mi (142.26 km) |
| Houthulst to Plombieres | 131.91 mi (212.28 km) |
