| Columbia to Opwijk | 4,238.73 mi (6,821.57 km) |
| Columbia to Ostend | 4,181.05 mi (6,728.75 km) |
| Columbia to Oud-Heverlee | 4,261.67 mi (6,858.50 km) |
| Columbia to Oud-Turnhout | 4,263.05 mi (6,860.72 km) |
| Columbia to Oudenaarde | 4,217.51 mi (6,787.42 km) |
| Columbia to Oudenburg | 4,185.30 mi (6,735.59 km) |
| Columbia to Oupeye | 4,304.66 mi (6,927.67 km) |
| Columbia to Overijse | 4,257.40 mi (6,851.62 km) |
| Columbia to Overpelt | 4,283.02 mi (6,892.86 km) |
| Columbia to Paal | 4,277.40 mi (6,883.81 km) |
| Columbia to Peer | 4,286.55 mi (6,898.54 km) |
| Columbia to Pepinster | 4,315.26 mi (6,944.75 km) |
| Columbia to Peruwelz | 4,224.53 mi (6,798.72 km) |
| Columbia to Perwez | 4,272.77 mi (6,876.36 km) |
| Columbia to Philippeville | 4,272.06 mi (6,875.21 km) |
