| Gravesend to Opwijk | 168.35 mi (270.93 km) |
| Gravesend to Ostend | 111.12 mi (178.82 km) |
| Gravesend to Oud-Heverlee | 190.99 mi (307.37 km) |
| Gravesend to Oud-Turnhout | 199.17 mi (320.53 km) |
| Gravesend to Oudenaarde | 145.90 mi (234.80 km) |
| Gravesend to Oudenburg | 115.04 mi (185.13 km) |
| Gravesend to Oupeye | 234.46 mi (377.33 km) |
| Gravesend to Overijse | 186.26 mi (299.76 km) |
| Gravesend to Overpelt | 218.45 mi (351.57 km) |
| Gravesend to Paal | 209.63 mi (337.36 km) |
| Gravesend to Peer | 220.73 mi (355.22 km) |
| Gravesend to Pepinster | 244.40 mi (393.33 km) |
| Gravesend to Peruwelz | 153.74 mi (247.42 km) |
| Gravesend to Perwez | 201.25 mi (323.89 km) |
| Gravesend to Philippeville | 201.63 mi (324.50 km) |
