| Waltham Cross to Opwijk | 188.68 mi (303.64 km) |
| Waltham Cross to Ostend | 131.02 mi (210.86 km) |
| Waltham Cross to Oud-Heverlee | 211.53 mi (340.43 km) |
| Waltham Cross to Oud-Turnhout | 217.22 mi (349.58 km) |
| Waltham Cross to Oudenaarde | 167.32 mi (269.28 km) |
| Waltham Cross to Oudenburg | 135.17 mi (217.54 km) |
| Waltham Cross to Oupeye | 254.80 mi (410.06 km) |
| Waltham Cross to Overijse | 207.12 mi (333.33 km) |
| Waltham Cross to Overpelt | 236.83 mi (381.14 km) |
| Waltham Cross to Paal | 228.94 mi (368.44 km) |
| Waltham Cross to Peer | 239.47 mi (385.39 km) |
| Waltham Cross to Pepinster | 265.11 mi (426.65 km) |
| Waltham Cross to Peruwelz | 176.45 mi (283.98 km) |
| Waltham Cross to Perwez | 222.49 mi (358.06 km) |
| Waltham Cross to Philippeville | 224.34 mi (361.04 km) |
