| Isperih to Opwijk | 1,166.51 mi (1,877.32 km) |
| Isperih to Ostend | 1,224.17 mi (1,970.11 km) |
| Isperih to Oud-Heverlee | 1,143.69 mi (1,840.59 km) |
| Isperih to Oud-Turnhout | 1,140.83 mi (1,835.98 km) |
| Isperih to Oudenaarde | 1,188.71 mi (1,913.05 km) |
| Isperih to Oudenburg | 1,220.01 mi (1,963.42 km) |
| Isperih to Oupeye | 1,100.38 mi (1,770.90 km) |
| Isperih to Overijse | 1,148.28 mi (1,847.97 km) |
| Isperih to Overpelt | 1,120.86 mi (1,803.85 km) |
| Isperih to Paal | 1,126.95 mi (1,813.66 km) |
| Isperih to Peer | 1,117.46 mi (1,798.38 km) |
| Isperih to Pepinster | 1,090.16 mi (1,754.45 km) |
| Isperih to Peruwelz | 1,183.50 mi (1,904.66 km) |
| Isperih to Perwez | 1,133.34 mi (1,823.94 km) |
| Isperih to Philippeville | 1,136.77 mi (1,829.45 km) |
