| Nelson to Montalegre | 868.58 mi (1,397.84 km) |
| Nelson to Montemor-o-Novo | 1,086.64 mi (1,748.78 km) |
| Nelson to Montemor-o-Velho | 991.27 mi (1,595.29 km) |
| Nelson to Montijo | 1,093.24 mi (1,759.41 km) |
| Nelson to Mortagua | 967.28 mi (1,556.68 km) |
| Nelson to Moura | 1,112.79 mi (1,790.87 km) |
| Nelson to Murtosa | 952.88 mi (1,533.52 km) |
| Nelson to Nazare | 1,034.46 mi (1,664.80 km) |
| Nelson to Nelas | 956.68 mi (1,539.63 km) |
| Nelson to Obidos | 1,051.86 mi (1,692.81 km) |
| Nelson to Odemira | 1,163.56 mi (1,872.57 km) |
| Nelson to Odivelas | 1,089.98 mi (1,754.16 km) |
| Nelson to Oeiras | 1,099.07 mi (1,768.77 km) |
| Nelson to Olhao | 1,192.00 mi (1,918.35 km) |
| Nelson to Oliveira de Azemeis | 943.52 mi (1,518.45 km) |
