| Viadana to Montemor-o-Novo | 1,054.95 mi (1,697.78 km) |
| Viadana to Montemor-o-Velho | 1,028.41 mi (1,655.07 km) |
| Viadana to Montijo | 1,085.74 mi (1,747.33 km) |
| Viadana to Mortagua | 999.18 mi (1,608.02 km) |
| Viadana to Moura | 1,038.13 mi (1,670.72 km) |
| Viadana to Murtosa | 1,010.09 mi (1,625.58 km) |
| Viadana to Nazare | 1,063.75 mi (1,711.94 km) |
| Viadana to Nelas | 978.45 mi (1,574.66 km) |
| Viadana to Obidos | 1,075.66 mi (1,731.11 km) |
| Viadana to Odemira | 1,112.97 mi (1,791.16 km) |
| Viadana to Odivelas | 1,095.25 mi (1,762.64 km) |
| Viadana to Oeiras | 1,105.31 mi (1,778.82 km) |
| Viadana to Olhao | 1,098.73 mi (1,768.23 km) |
| Viadana to Oliveira de Azemeis | 999.60 mi (1,608.69 km) |
| Viadana to Oliveira de Frades | 988.88 mi (1,591.45 km) |
