| Clarksville to Opwijk | 4,373.50 mi (7,038.47 km) |
| Clarksville to Ostend | 4,316.30 mi (6,946.41 km) |
| Clarksville to Oud-Heverlee | 4,396.47 mi (7,075.43 km) |
| Clarksville to Oud-Turnhout | 4,393.94 mi (7,071.37 km) |
| Clarksville to Oudenaarde | 4,354.15 mi (7,007.32 km) |
| Clarksville to Oudenburg | 4,320.71 mi (6,953.50 km) |
| Clarksville to Oupeye | 4,438.46 mi (7,143.01 km) |
| Clarksville to Overijse | 4,392.78 mi (7,069.50 km) |
| Clarksville to Overpelt | 4,413.79 mi (7,103.32 km) |
| Clarksville to Paal | 4,409.84 mi (7,096.96 km) |
| Clarksville to Peer | 4,417.83 mi (7,109.81 km) |
| Clarksville to Pepinster | 4,449.69 mi (7,161.09 km) |
| Clarksville to Peruwelz | 4,363.50 mi (7,022.37 km) |
| Clarksville to Perwez | 4,408.72 mi (7,095.15 km) |
| Clarksville to Philippeville | 4,411.39 mi (7,099.45 km) |
