| Rheinberg to Montemor-o-Novo | 1,142.77 mi (1,839.11 km) |
| Rheinberg to Montemor-o-Velho | 1,072.40 mi (1,725.86 km) |
| Rheinberg to Montijo | 1,161.76 mi (1,869.68 km) |
| Rheinberg to Mortagua | 1,043.32 mi (1,679.06 km) |
| Rheinberg to Moura | 1,150.21 mi (1,851.08 km) |
| Rheinberg to Murtosa | 1,040.08 mi (1,673.84 km) |
| Rheinberg to Nazare | 1,115.84 mi (1,795.78 km) |
| Rheinberg to Nelas | 1,026.49 mi (1,651.98 km) |
| Rheinberg to Obidos | 1,132.12 mi (1,821.97 km) |
| Rheinberg to Odemira | 1,216.80 mi (1,958.24 km) |
| Rheinberg to Odivelas | 1,164.46 mi (1,874.02 km) |
| Rheinberg to Oeiras | 1,174.77 mi (1,890.61 km) |
| Rheinberg to Olhao | 1,226.75 mi (1,974.26 km) |
| Rheinberg to Oliveira de Azemeis | 1,029.14 mi (1,656.24 km) |
| Rheinberg to Oliveira de Frades | 1,026.27 mi (1,651.62 km) |
