| Zachary to Opwijk | 4,821.08 mi (7,758.78 km) |
| Zachary to Ostend | 4,763.66 mi (7,666.37 km) |
| Zachary to Oud-Heverlee | 4,844.07 mi (7,795.78 km) |
| Zachary to Oud-Turnhout | 4,842.71 mi (7,793.59 km) |
| Zachary to Oudenaarde | 4,801.12 mi (7,726.66 km) |
| Zachary to Oudenburg | 4,768.02 mi (7,673.39 km) |
| Zachary to Oupeye | 4,886.41 mi (7,863.92 km) |
| Zachary to Overijse | 4,840.20 mi (7,789.55 km) |
| Zachary to Overpelt | 4,862.62 mi (7,825.63 km) |
| Zachary to Paal | 4,858.17 mi (7,818.47 km) |
| Zachary to Peer | 4,866.51 mi (7,831.89 km) |
| Zachary to Pepinster | 4,897.47 mi (7,881.72 km) |
| Zachary to Peruwelz | 4,809.75 mi (7,740.55 km) |
| Zachary to Perwez | 4,855.98 mi (7,814.94 km) |
| Zachary to Philippeville | 4,857.59 mi (7,817.54 km) |
