| Apex to Opwijk | 4,075.10 mi (6,558.24 km) |
| Apex to Ostend | 4,017.42 mi (6,465.42 km) |
| Apex to Oud-Heverlee | 4,098.05 mi (6,595.17 km) |
| Apex to Oud-Turnhout | 4,099.39 mi (6,597.33 km) |
| Apex to Oudenaarde | 4,053.90 mi (6,524.12 km) |
| Apex to Oudenburg | 4,021.68 mi (6,472.26 km) |
| Apex to Oupeye | 4,141.02 mi (6,664.33 km) |
| Apex to Overijse | 4,093.78 mi (6,588.30 km) |
| Apex to Overpelt | 4,119.36 mi (6,629.46 km) |
| Apex to Paal | 4,113.75 mi (6,620.44 km) |
| Apex to Peer | 4,122.89 mi (6,635.15 km) |
| Apex to Pepinster | 4,151.63 mi (6,681.41 km) |
| Apex to Peruwelz | 4,060.96 mi (6,535.48 km) |
| Apex to Perwez | 4,109.16 mi (6,613.05 km) |
| Apex to Philippeville | 4,108.50 mi (6,611.99 km) |
