| Bois-Guillaume to Opwijk | 170.39 mi (274.22 km) |
| Bois-Guillaume to Ostend | 144.96 mi (233.29 km) |
| Bois-Guillaume to Oud-Heverlee | 183.10 mi (294.67 km) |
| Bois-Guillaume to Oud-Turnhout | 212.67 mi (342.25 km) |
| Bois-Guillaume to Oudenaarde | 145.41 mi (234.01 km) |
| Bois-Guillaume to Oudenburg | 144.54 mi (232.61 km) |
| Bois-Guillaume to Oupeye | 217.98 mi (350.80 km) |
| Bois-Guillaume to Overijse | 176.33 mi (283.77 km) |
| Bois-Guillaume to Overpelt | 224.60 mi (361.46 km) |
| Bois-Guillaume to Paal | 209.29 mi (336.82 km) |
| Bois-Guillaume to Peer | 223.08 mi (359.01 km) |
| Bois-Guillaume to Pepinster | 221.83 mi (357.00 km) |
| Bois-Guillaume to Peruwelz | 131.17 mi (211.09 km) |
| Bois-Guillaume to Perwez | 182.30 mi (293.39 km) |
| Bois-Guillaume to Philippeville | 160.97 mi (259.06 km) |
