| Harsova to Opwijk | 1,178.53 mi (1,896.66 km) |
| Harsova to Ostend | 1,235.89 mi (1,988.97 km) |
| Harsova to Oud-Heverlee | 1,155.98 mi (1,860.36 km) |
| Harsova to Oud-Turnhout | 1,150.39 mi (1,851.37 km) |
| Harsova to Oudenaarde | 1,201.76 mi (1,934.04 km) |
| Harsova to Oudenburg | 1,231.88 mi (1,982.52 km) |
| Harsova to Oupeye | 1,112.46 mi (1,790.33 km) |
| Harsova to Overijse | 1,160.93 mi (1,868.34 km) |
| Harsova to Overpelt | 1,130.52 mi (1,819.39 km) |
| Harsova to Paal | 1,137.75 mi (1,831.03 km) |
| Harsova to Peer | 1,127.51 mi (1,814.55 km) |
| Harsova to Pepinster | 1,102.82 mi (1,774.82 km) |
| Harsova to Peruwelz | 1,198.19 mi (1,928.30 km) |
| Harsova to Perwez | 1,146.57 mi (1,845.23 km) |
| Harsova to Philippeville | 1,152.37 mi (1,854.56 km) |
