| Clarkston to Opwijk | 4,385.44 mi (7,057.69 km) |
| Clarkston to Ostend | 4,327.85 mi (6,965.00 km) |
| Clarkston to Oud-Heverlee | 4,408.43 mi (7,094.68 km) |
| Clarkston to Oud-Turnhout | 4,408.53 mi (7,094.84 km) |
| Clarkston to Oudenaarde | 4,364.80 mi (7,024.47 km) |
| Clarkston to Oudenburg | 4,332.15 mi (6,971.93 km) |
| Clarkston to Oupeye | 4,451.14 mi (7,163.42 km) |
| Clarkston to Overijse | 4,404.34 mi (7,088.09 km) |
| Clarkston to Overpelt | 4,428.48 mi (7,126.96 km) |
| Clarkston to Paal | 4,423.40 mi (7,118.78 km) |
| Clarkston to Peer | 4,432.19 mi (7,132.91 km) |
| Clarkston to Pepinster | 4,461.96 mi (7,180.84 km) |
| Clarkston to Peruwelz | 4,372.59 mi (7,037.00 km) |
| Clarkston to Perwez | 4,419.91 mi (7,113.16 km) |
| Clarkston to Philippeville | 4,420.30 mi (7,113.78 km) |
