| Neder-Over-Heembeek to Montemor-o-Novo | 1,044.88 mi (1,681.57 km) |
| Neder-Over-Heembeek to Montemor-o-Velho | 971.71 mi (1,563.81 km) |
| Neder-Over-Heembeek to Montijo | 1,062.73 mi (1,710.30 km) |
| Neder-Over-Heembeek to Mortagua | 942.89 mi (1,517.44 km) |
| Neder-Over-Heembeek to Moura | 1,054.45 mi (1,696.98 km) |
| Neder-Over-Heembeek to Murtosa | 938.70 mi (1,510.69 km) |
| Neder-Over-Heembeek to Nazare | 1,015.37 mi (1,634.09 km) |
| Neder-Over-Heembeek to Nelas | 926.51 mi (1,491.08 km) |
| Neder-Over-Heembeek to Obidos | 1,031.84 mi (1,660.58 km) |
| Neder-Over-Heembeek to Odemira | 1,119.65 mi (1,801.91 km) |
| Neder-Over-Heembeek to Odivelas | 1,064.88 mi (1,713.76 km) |
| Neder-Over-Heembeek to Oeiras | 1,075.13 mi (1,730.25 km) |
| Neder-Over-Heembeek to Olhao | 1,131.80 mi (1,821.45 km) |
| Neder-Over-Heembeek to Oliveira de Azemeis | 927.82 mi (1,493.18 km) |
| Neder-Over-Heembeek to Oliveira de Frades | 925.51 mi (1,489.47 km) |
