| Santander to Montalegre | 232.11 mi (373.54 km) |
| Santander to Montemor-o-Novo | 404.10 mi (650.34 km) |
| Santander to Montemor-o-Velho | 338.96 mi (545.51 km) |
| Santander to Montijo | 423.47 mi (681.51 km) |
| Santander to Mortagua | 309.11 mi (497.46 km) |
| Santander to Moura | 414.55 mi (667.16 km) |
| Santander to Murtosa | 311.10 mi (500.67 km) |
| Santander to Nazare | 381.03 mi (613.20 km) |
| Santander to Nelas | 290.77 mi (467.95 km) |
| Santander to Obidos | 396.53 mi (638.16 km) |
| Santander to Odemira | 478.68 mi (770.36 km) |
| Santander to Odivelas | 426.97 mi (687.14 km) |
| Santander to Oeiras | 437.37 mi (703.87 km) |
| Santander to Olhao | 492.89 mi (793.23 km) |
| Santander to Oliveira de Azemeis | 300.03 mi (482.84 km) |
