| Cadiz to Opwijk | 1,123.43 mi (1,807.98 km) |
| Cadiz to Ostend | 1,111.94 mi (1,789.49 km) |
| Cadiz to Oud-Heverlee | 1,126.86 mi (1,813.51 km) |
| Cadiz to Oud-Turnhout | 1,162.37 mi (1,870.65 km) |
| Cadiz to Oudenaarde | 1,103.49 mi (1,775.90 km) |
| Cadiz to Oudenburg | 1,110.97 mi (1,787.93 km) |
| Cadiz to Oupeye | 1,143.79 mi (1,840.76 km) |
| Cadiz to Overijse | 1,120.80 mi (1,803.75 km) |
| Cadiz to Overpelt | 1,166.96 mi (1,878.03 km) |
| Cadiz to Paal | 1,150.87 mi (1,852.15 km) |
| Cadiz to Peer | 1,163.07 mi (1,871.77 km) |
| Cadiz to Pepinster | 1,140.36 mi (1,835.24 km) |
| Cadiz to Peruwelz | 1,083.26 mi (1,743.34 km) |
| Cadiz to Perwez | 1,118.36 mi (1,799.82 km) |
| Cadiz to Philippeville | 1,087.52 mi (1,750.19 km) |
