| Cities | Distance |
|---|---|
| Olen to Ostend | 83.77 mi (134.81 km) |
| Olen to Oud-Heverlee | 23.29 mi (37.48 km) |
| Olen to Oud-Turnhout | 12.88 mi (20.73 km) |
| Olen to Oudenaarde | 58.17 mi (93.62 km) |
| Olen to Oudenburg | 80.18 mi (129.04 km) |
| Olen to Oupeye | 46.09 mi (74.17 km) |
| Olen to Overijse | 28.84 mi (46.42 km) |
| Olen to Overpelt | 24.97 mi (40.19 km) |
| Olen to Paal | 15.96 mi (25.69 km) |
| Olen to Peer | 26.19 mi (42.15 km) |
| Olen to Pepinster | 58.32 mi (93.86 km) |
| Olen to Peruwelz | 70.50 mi (113.45 km) |
| Olen to Perwez | 36.37 mi (58.53 km) |
| Olen to Philippeville | 66.94 mi (107.73 km) |
| Olen to Plombieres | 55.88 mi (89.93 km) |