| Gainsborough to Opwijk | 268.95 mi (432.83 km) |
| Gainsborough to Ostend | 216.58 mi (348.54 km) |
| Gainsborough to Oud-Heverlee | 290.99 mi (468.31 km) |
| Gainsborough to Oud-Turnhout | 282.28 mi (454.28 km) |
| Gainsborough to Oudenaarde | 255.83 mi (411.72 km) |
| Gainsborough to Oudenburg | 221.12 mi (355.85 km) |
| Gainsborough to Oupeye | 329.87 mi (530.87 km) |
| Gainsborough to Overijse | 288.78 mi (464.75 km) |
| Gainsborough to Overpelt | 301.78 mi (485.67 km) |
| Gainsborough to Paal | 299.83 mi (482.53 km) |
| Gainsborough to Peer | 306.27 mi (492.89 km) |
| Gainsborough to Pepinster | 341.84 mi (550.14 km) |
| Gainsborough to Peruwelz | 272.18 mi (438.04 km) |
| Gainsborough to Perwez | 305.30 mi (491.34 km) |
| Gainsborough to Philippeville | 317.12 mi (510.35 km) |
