| Marinha Grande to Opwijk | 999.98 mi (1,609.31 km) |
| Marinha Grande to Ostend | 976.31 mi (1,571.22 km) |
| Marinha Grande to Oud-Heverlee | 1,008.38 mi (1,622.83 km) |
| Marinha Grande to Oud-Turnhout | 1,041.57 mi (1,676.25 km) |
| Marinha Grande to Oudenaarde | 976.60 mi (1,571.68 km) |
| Marinha Grande to Oudenburg | 976.34 mi (1,571.27 km) |
| Marinha Grande to Oupeye | 1,033.82 mi (1,663.77 km) |
| Marinha Grande to Overijse | 1,001.80 mi (1,612.24 km) |
| Marinha Grande to Overpelt | 1,050.24 mi (1,690.20 km) |
| Marinha Grande to Paal | 1,034.13 mi (1,664.27 km) |
| Marinha Grande to Peer | 1,047.44 mi (1,685.69 km) |
| Marinha Grande to Pepinster | 1,033.13 mi (1,662.66 km) |
| Marinha Grande to Peruwelz | 959.40 mi (1,544.00 km) |
| Marinha Grande to Perwez | 1,003.09 mi (1,614.32 km) |
| Marinha Grande to Philippeville | 974.59 mi (1,568.45 km) |
