| Conflans-Sainte-Honorine to Opwijk | 164.49 mi (264.72 km) |
| Conflans-Sainte-Honorine to Ostend | 158.08 mi (254.41 km) |
| Conflans-Sainte-Honorine to Oud-Heverlee | 170.61 mi (274.58 km) |
| Conflans-Sainte-Honorine to Oud-Turnhout | 204.78 mi (329.56 km) |
| Conflans-Sainte-Honorine to Oudenaarde | 144.27 mi (232.17 km) |
| Conflans-Sainte-Honorine to Oudenburg | 156.11 mi (251.23 km) |
| Conflans-Sainte-Honorine to Oupeye | 197.15 mi (317.27 km) |
| Conflans-Sainte-Honorine to Overijse | 164.13 mi (264.14 km) |
| Conflans-Sainte-Honorine to Overpelt | 212.32 mi (341.70 km) |
| Conflans-Sainte-Honorine to Paal | 196.17 mi (315.71 km) |
| Conflans-Sainte-Honorine to Peer | 209.43 mi (337.04 km) |
| Conflans-Sainte-Honorine to Pepinster | 198.07 mi (318.77 km) |
| Conflans-Sainte-Honorine to Peruwelz | 124.04 mi (199.62 km) |
| Conflans-Sainte-Honorine to Perwez | 165.13 mi (265.76 km) |
| Conflans-Sainte-Honorine to Philippeville | 137.60 mi (221.45 km) |
