| Cities | Distance |
|---|---|
| Harrow to Opwijk | 200.34 mi (322.42 km) |
| Harrow to Ostend | 142.90 mi (229.98 km) |
| Harrow to Oud-Heverlee | 223.05 mi (358.97 km) |
| Harrow to Oud-Turnhout | 230.18 mi (370.44 km) |
| Harrow to Oudenaarde | 178.13 mi (286.67 km) |
| Harrow to Oudenburg | 146.91 mi (236.44 km) |
| Harrow to Oupeye | 266.48 mi (428.86 km) |
| Harrow to Overijse | 218.41 mi (351.49 km) |
| Harrow to Overpelt | 249.65 mi (401.77 km) |
| Harrow to Paal | 241.26 mi (388.27 km) |
| Harrow to Peer | 252.11 mi (405.72 km) |
| Harrow to Pepinster | 276.53 mi (445.03 km) |
| Harrow to Peruwelz | 185.89 mi (299.17 km) |
| Harrow to Perwez | 233.47 mi (375.74 km) |
| Harrow to Philippeville | 233.77 mi (376.22 km) |