| Harper Woods to Opwijk | 3,924.39 mi (6,315.69 km) |
| Harper Woods to Ostend | 3,867.53 mi (6,224.18 km) |
| Harper Woods to Oud-Heverlee | 3,947.30 mi (6,352.56 km) |
| Harper Woods to Oud-Turnhout | 3,943.40 mi (6,346.29 km) |
| Harper Woods to Oudenaarde | 3,905.77 mi (6,285.74 km) |
| Harper Woods to Oudenburg | 3,871.98 mi (6,231.34 km) |
| Harper Woods to Oupeye | 3,988.82 mi (6,419.38 km) |
| Harper Woods to Overijse | 3,943.84 mi (6,346.99 km) |
| Harper Woods to Overpelt | 3,963.15 mi (6,378.08 km) |
| Harper Woods to Paal | 3,959.80 mi (6,372.68 km) |
| Harper Woods to Peer | 3,967.35 mi (6,384.84 km) |
| Harper Woods to Pepinster | 4,000.24 mi (6,437.77 km) |
| Harper Woods to Peruwelz | 3,915.97 mi (6,302.14 km) |
| Harper Woods to Perwez | 3,959.93 mi (6,372.89 km) |
| Harper Woods to Philippeville | 3,963.86 mi (6,379.21 km) |
