| Niscemi to Opwijk | 1,078.31 mi (1,735.38 km) |
| Niscemi to Ostend | 1,123.24 mi (1,807.67 km) |
| Niscemi to Oud-Heverlee | 1,059.54 mi (1,705.16 km) |
| Niscemi to Oud-Turnhout | 1,081.74 mi (1,740.89 km) |
| Niscemi to Oudenaarde | 1,085.18 mi (1,746.43 km) |
| Niscemi to Oudenburg | 1,118.84 mi (1,800.60 km) |
| Niscemi to Oupeye | 1,031.12 mi (1,659.42 km) |
| Niscemi to Overijse | 1,059.55 mi (1,705.19 km) |
| Niscemi to Overpelt | 1,066.76 mi (1,716.79 km) |
| Niscemi to Paal | 1,060.98 mi (1,707.49 km) |
| Niscemi to Peer | 1,060.89 mi (1,707.34 km) |
| Niscemi to Pepinster | 1,018.91 mi (1,639.77 km) |
| Niscemi to Peruwelz | 1,066.45 mi (1,716.28 km) |
| Niscemi to Perwez | 1,043.79 mi (1,679.82 km) |
| Niscemi to Philippeville | 1,024.83 mi (1,649.31 km) |
