| North Olmsted to Opwijk | 3,932.13 mi (6,328.15 km) |
| North Olmsted to Ostend | 3,875.03 mi (6,236.26 km) |
| North Olmsted to Oud-Heverlee | 3,955.08 mi (6,365.09 km) |
| North Olmsted to Oud-Turnhout | 3,952.13 mi (6,360.34 km) |
| North Olmsted to Oudenaarde | 3,913.02 mi (6,297.39 km) |
| North Olmsted to Oudenburg | 3,879.45 mi (6,243.38 km) |
| North Olmsted to Oupeye | 3,996.93 mi (6,432.44 km) |
| North Olmsted to Overijse | 3,951.47 mi (6,359.28 km) |
| North Olmsted to Overpelt | 3,971.95 mi (6,392.24 km) |
| North Olmsted to Paal | 3,968.18 mi (6,386.17 km) |
| North Olmsted to Peer | 3,976.04 mi (6,398.81 km) |
| North Olmsted to Pepinster | 4,008.23 mi (6,450.62 km) |
| North Olmsted to Peruwelz | 3,922.66 mi (6,312.91 km) |
| North Olmsted to Perwez | 3,967.46 mi (6,385.01 km) |
| North Olmsted to Philippeville | 3,970.56 mi (6,390.00 km) |
