| Cartagena to Opwijk | 957.63 mi (1,541.15 km) |
| Cartagena to Ostend | 960.58 mi (1,545.91 km) |
| Cartagena to Oud-Heverlee | 955.44 mi (1,537.64 km) |
| Cartagena to Oud-Turnhout | 991.51 mi (1,595.68 km) |
| Cartagena to Oudenaarde | 942.70 mi (1,517.13 km) |
| Cartagena to Oudenburg | 958.51 mi (1,542.58 km) |
| Cartagena to Oupeye | 962.43 mi (1,548.89 km) |
| Cartagena to Overijse | 950.29 mi (1,529.35 km) |
| Cartagena to Overpelt | 991.47 mi (1,595.62 km) |
| Cartagena to Paal | 976.27 mi (1,571.15 km) |
| Cartagena to Peer | 986.63 mi (1,587.83 km) |
| Cartagena to Pepinster | 956.34 mi (1,539.08 km) |
| Cartagena to Peruwelz | 920.34 mi (1,481.14 km) |
| Cartagena to Perwez | 943.97 mi (1,519.17 km) |
| Cartagena to Philippeville | 912.45 mi (1,468.45 km) |
