| Gloucester Point to Opwijk | 3,905.57 mi (6,285.40 km) |
| Gloucester Point to Ostend | 3,847.89 mi (6,192.58 km) |
| Gloucester Point to Oud-Heverlee | 3,928.51 mi (6,322.33 km) |
| Gloucester Point to Oud-Turnhout | 3,929.97 mi (6,324.67 km) |
| Gloucester Point to Oudenaarde | 3,884.32 mi (6,251.21 km) |
| Gloucester Point to Oudenburg | 3,852.14 mi (6,199.42 km) |
| Gloucester Point to Oupeye | 3,971.50 mi (6,391.52 km) |
| Gloucester Point to Overijse | 3,924.23 mi (6,315.43 km) |
| Gloucester Point to Overpelt | 3,949.94 mi (6,356.81 km) |
| Gloucester Point to Paal | 3,944.28 mi (6,347.70 km) |
| Gloucester Point to Peer | 3,953.45 mi (6,362.47 km) |
| Gloucester Point to Pepinster | 3,982.10 mi (6,408.57 km) |
| Gloucester Point to Peruwelz | 3,891.33 mi (6,262.49 km) |
| Gloucester Point to Perwez | 3,939.59 mi (6,340.16 km) |
| Gloucester Point to Philippeville | 3,938.86 mi (6,338.98 km) |
