| Ialysos to Opwijk | 1,550.93 mi (2,495.98 km) |
| Ialysos to Ostend | 1,607.28 mi (2,586.67 km) |
| Ialysos to Oud-Heverlee | 1,528.14 mi (2,459.31 km) |
| Ialysos to Oud-Turnhout | 1,534.41 mi (2,469.39 km) |
| Ialysos to Oudenaarde | 1,568.72 mi (2,524.60 km) |
| Ialysos to Oudenburg | 1,602.80 mi (2,579.45 km) |
| Ialysos to Oupeye | 1,487.45 mi (2,393.83 km) |
| Ialysos to Overijse | 1,531.31 mi (2,464.41 km) |
| Ialysos to Overpelt | 1,514.96 mi (2,438.09 km) |
| Ialysos to Paal | 1,517.09 mi (2,441.51 km) |
| Ialysos to Peer | 1,510.42 mi (2,430.79 km) |
| Ialysos to Pepinster | 1,475.75 mi (2,374.99 km) |
| Ialysos to Peruwelz | 1,557.97 mi (2,507.31 km) |
| Ialysos to Perwez | 1,515.06 mi (2,438.25 km) |
| Ialysos to Philippeville | 1,510.11 mi (2,430.29 km) |
