| Decatur to Opwijk | 4,274.63 mi (6,879.35 km) |
| Decatur to Ostend | 4,218.02 mi (6,788.25 km) |
| Decatur to Oud-Heverlee | 4,297.49 mi (6,916.14 km) |
| Decatur to Oud-Turnhout | 4,292.71 mi (6,908.44 km) |
| Decatur to Oudenaarde | 4,256.47 mi (6,850.13 km) |
| Decatur to Oudenburg | 4,222.49 mi (6,795.44 km) |
| Decatur to Oupeye | 4,338.68 mi (6,982.43 km) |
| Decatur to Overijse | 4,294.17 mi (6,910.79 km) |
| Decatur to Overpelt | 4,312.38 mi (6,940.11 km) |
| Decatur to Paal | 4,309.42 mi (6,935.34 km) |
| Decatur to Peer | 4,316.69 mi (6,947.03 km) |
| Decatur to Pepinster | 4,350.22 mi (7,001.00 km) |
| Decatur to Peruwelz | 4,267.14 mi (6,867.31 km) |
| Decatur to Perwez | 4,310.34 mi (6,936.83 km) |
| Decatur to Philippeville | 4,314.99 mi (6,944.31 km) |
