| Northbrook to Opwijk | 4,124.46 mi (6,637.68 km) |
| Northbrook to Ostend | 4,068.10 mi (6,546.98 km) |
| Northbrook to Oud-Heverlee | 4,147.26 mi (6,674.37 km) |
| Northbrook to Oud-Turnhout | 4,141.73 mi (6,665.47 km) |
| Northbrook to Oudenaarde | 4,106.73 mi (6,609.14 km) |
| Northbrook to Oudenburg | 4,072.59 mi (6,554.21 km) |
| Northbrook to Oupeye | 4,188.15 mi (6,740.17 km) |
| Northbrook to Overijse | 4,144.07 mi (6,669.23 km) |
| Northbrook to Overpelt | 4,161.33 mi (6,697.01 km) |
| Northbrook to Paal | 4,158.70 mi (6,692.78 km) |
| Northbrook to Peer | 4,165.72 mi (6,704.08 km) |
| Northbrook to Pepinster | 4,199.78 mi (6,758.89 km) |
| Northbrook to Peruwelz | 4,117.84 mi (6,627.02 km) |
| Northbrook to Perwez | 4,160.31 mi (6,695.38 km) |
| Northbrook to Philippeville | 4,165.63 mi (6,703.94 km) |
