| Santiponce to Opwijk | 1,061.02 mi (1,707.55 km) |
| Santiponce to Ostend | 1,048.92 mi (1,688.08 km) |
| Santiponce to Oud-Heverlee | 1,064.74 mi (1,713.54 km) |
| Santiponce to Oud-Turnhout | 1,100.16 mi (1,770.53 km) |
| Santiponce to Oudenaarde | 1,040.88 mi (1,675.13 km) |
| Santiponce to Oudenburg | 1,048.00 mi (1,686.59 km) |
| Santiponce to Oupeye | 1,082.25 mi (1,741.71 km) |
| Santiponce to Overijse | 1,058.64 mi (1,703.72 km) |
| Santiponce to Overpelt | 1,105.00 mi (1,778.33 km) |
| Santiponce to Paal | 1,088.89 mi (1,752.41 km) |
| Santiponce to Peer | 1,101.17 mi (1,772.17 km) |
| Santiponce to Pepinster | 1,079.00 mi (1,736.48 km) |
| Santiponce to Peruwelz | 1,020.77 mi (1,642.78 km) |
| Santiponce to Perwez | 1,056.42 mi (1,700.14 km) |
| Santiponce to Philippeville | 1,025.68 mi (1,650.67 km) |
