| Portugalete to Opwijk | 626.83 mi (1,008.78 km) |
| Portugalete to Ostend | 612.65 mi (985.97 km) |
| Portugalete to Oud-Heverlee | 631.97 mi (1,017.05 km) |
| Portugalete to Oud-Turnhout | 666.84 mi (1,073.18 km) |
| Portugalete to Oudenaarde | 605.83 mi (974.99 km) |
| Portugalete to Oudenburg | 611.81 mi (984.62 km) |
| Portugalete to Oupeye | 652.66 mi (1,050.36 km) |
| Portugalete to Overijse | 625.68 mi (1,006.93 km) |
| Portugalete to Overpelt | 672.98 mi (1,083.06 km) |
| Portugalete to Paal | 656.79 mi (1,057.01 km) |
| Portugalete to Peer | 669.51 mi (1,077.47 km) |
| Portugalete to Pepinster | 650.59 mi (1,047.02 km) |
| Portugalete to Peruwelz | 586.32 mi (943.59 km) |
| Portugalete to Perwez | 624.68 mi (1,005.32 km) |
| Portugalete to Philippeville | 594.64 mi (956.98 km) |
