| Harrison to Opwijk | 3,624.07 mi (5,832.37 km) |
| Harrison to Ostend | 3,566.45 mi (5,739.65 km) |
| Harrison to Oud-Heverlee | 3,647.05 mi (5,869.35 km) |
| Harrison to Oud-Turnhout | 3,647.40 mi (5,869.92 km) |
| Harrison to Oudenaarde | 3,603.34 mi (5,799.01 km) |
| Harrison to Oudenburg | 3,570.75 mi (5,746.57 km) |
| Harrison to Oupeye | 3,689.81 mi (5,938.17 km) |
| Harrison to Overijse | 3,642.93 mi (5,862.72 km) |
| Harrison to Overpelt | 3,667.36 mi (5,902.05 km) |
| Harrison to Paal | 3,662.16 mi (5,893.68 km) |
| Harrison to Peer | 3,671.02 mi (5,907.94 km) |
| Harrison to Pepinster | 3,700.60 mi (5,955.54 km) |
| Harrison to Peruwelz | 3,611.04 mi (5,811.41 km) |
| Harrison to Perwez | 3,658.47 mi (5,887.75 km) |
| Harrison to Philippeville | 3,658.74 mi (5,888.17 km) |
