| Casale Monferrato to Opwijk | 448.57 mi (721.91 km) |
| Casale Monferrato to Ostend | 491.88 mi (791.60 km) |
| Casale Monferrato to Oud-Heverlee | 430.90 mi (693.47 km) |
| Casale Monferrato to Oud-Turnhout | 456.00 mi (733.86 km) |
| Casale Monferrato to Oudenaarde | 454.11 mi (730.82 km) |
| Casale Monferrato to Oudenburg | 487.51 mi (784.57 km) |
| Casale Monferrato to Oupeye | 406.52 mi (654.22 km) |
| Casale Monferrato to Overijse | 430.34 mi (692.57 km) |
| Casale Monferrato to Overpelt | 442.91 mi (712.79 km) |
| Casale Monferrato to Paal | 435.15 mi (700.31 km) |
| Casale Monferrato to Peer | 436.91 mi (703.14 km) |
| Casale Monferrato to Pepinster | 394.76 mi (635.30 km) |
| Casale Monferrato to Peruwelz | 435.03 mi (700.12 km) |
| Casale Monferrato to Perwez | 415.06 mi (667.98 km) |
| Casale Monferrato to Philippeville | 394.30 mi (634.57 km) |
