| Alpen to Montemor-o-Novo | 1,141.52 mi (1,837.09 km) |
| Alpen to Montemor-o-Velho | 1,070.85 mi (1,723.36 km) |
| Alpen to Montijo | 1,160.40 mi (1,867.48 km) |
| Alpen to Mortagua | 1,041.80 mi (1,676.61 km) |
| Alpen to Moura | 1,149.15 mi (1,849.38 km) |
| Alpen to Murtosa | 1,038.44 mi (1,671.21 km) |
| Alpen to Nazare | 1,114.32 mi (1,793.32 km) |
| Alpen to Nelas | 1,025.02 mi (1,649.61 km) |
| Alpen to Obidos | 1,130.62 mi (1,819.55 km) |
| Alpen to Odemira | 1,215.62 mi (1,956.35 km) |
| Alpen to Odivelas | 1,163.04 mi (1,871.73 km) |
| Alpen to Oeiras | 1,173.34 mi (1,888.31 km) |
| Alpen to Olhao | 1,225.77 mi (1,972.68 km) |
| Alpen to Oliveira de Azemeis | 1,027.51 mi (1,653.61 km) |
| Alpen to Oliveira de Frades | 1,024.71 mi (1,649.10 km) |
