| Essex to Opwijk | 3,810.75 mi (6,132.82 km) |
| Essex to Ostend | 3,753.14 mi (6,040.10 km) |
| Essex to Oud-Heverlee | 3,833.73 mi (6,169.80 km) |
| Essex to Oud-Turnhout | 3,834.06 mi (6,170.33 km) |
| Essex to Oudenaarde | 3,790.03 mi (6,099.46 km) |
| Essex to Oudenburg | 3,757.44 mi (6,047.02 km) |
| Essex to Oupeye | 3,876.49 mi (6,238.61 km) |
| Essex to Overijse | 3,829.62 mi (6,163.17 km) |
| Essex to Overpelt | 3,854.02 mi (6,202.45 km) |
| Essex to Paal | 3,848.84 mi (6,194.11 km) |
| Essex to Peer | 3,857.69 mi (6,208.35 km) |
| Essex to Pepinster | 3,887.28 mi (6,255.98 km) |
| Essex to Peruwelz | 3,797.73 mi (6,111.85 km) |
| Essex to Perwez | 3,845.16 mi (6,188.19 km) |
| Essex to Philippeville | 3,845.42 mi (6,188.61 km) |
