| Herdecke to Montemor-o-Novo | 1,161.32 mi (1,868.96 km) |
| Herdecke to Montemor-o-Velho | 1,093.31 mi (1,759.52 km) |
| Herdecke to Montijo | 1,181.19 mi (1,900.94 km) |
| Herdecke to Mortagua | 1,064.03 mi (1,712.39 km) |
| Herdecke to Moura | 1,167.20 mi (1,878.42 km) |
| Herdecke to Murtosa | 1,061.65 mi (1,708.56 km) |
| Herdecke to Nazare | 1,136.52 mi (1,829.06 km) |
| Herdecke to Nelas | 1,046.83 mi (1,684.71 km) |
| Herdecke to Obidos | 1,152.62 mi (1,854.96 km) |
| Herdecke to Odemira | 1,234.72 mi (1,987.09 km) |
| Herdecke to Odivelas | 1,184.34 mi (1,906.01 km) |
| Herdecke to Oeiras | 1,194.69 mi (1,922.68 km) |
| Herdecke to Olhao | 1,243.10 mi (2,000.58 km) |
| Herdecke to Oliveira de Azemeis | 1,050.66 mi (1,690.88 km) |
| Herdecke to Oliveira de Frades | 1,047.28 mi (1,685.43 km) |
