| Signa to Montemor-o-Novo | 1,061.76 mi (1,708.74 km) |
| Signa to Montemor-o-Velho | 1,043.70 mi (1,679.68 km) |
| Signa to Montijo | 1,094.06 mi (1,760.73 km) |
| Signa to Mortagua | 1,015.13 mi (1,633.69 km) |
| Signa to Moura | 1,040.78 mi (1,674.98 km) |
| Signa to Murtosa | 1,028.25 mi (1,654.81 km) |
| Signa to Nazare | 1,076.83 mi (1,732.99 km) |
| Signa to Nelas | 994.21 mi (1,600.03 km) |
| Signa to Obidos | 1,087.71 mi (1,750.51 km) |
| Signa to Odemira | 1,115.64 mi (1,795.44 km) |
| Signa to Odivelas | 1,104.62 mi (1,777.71 km) |
| Signa to Oeiras | 1,114.42 mi (1,793.49 km) |
| Signa to Olhao | 1,097.10 mi (1,765.61 km) |
| Signa to Oliveira de Azemeis | 1,018.08 mi (1,638.45 km) |
| Signa to Oliveira de Frades | 1,006.26 mi (1,619.42 km) |
