| Sona to Montemor-o-Novo | 1,080.45 mi (1,738.82 km) |
| Sona to Montemor-o-Velho | 1,050.95 mi (1,691.34 km) |
| Sona to Montijo | 1,110.68 mi (1,787.47 km) |
| Sona to Mortagua | 1,021.52 mi (1,643.98 km) |
| Sona to Moura | 1,065.02 mi (1,713.99 km) |
| Sona to Murtosa | 1,031.57 mi (1,660.16 km) |
| Sona to Nazare | 1,087.05 mi (1,749.43 km) |
| Sona to Nelas | 1,000.89 mi (1,610.78 km) |
| Sona to Obidos | 1,099.31 mi (1,769.17 km) |
| Sona to Odemira | 1,139.76 mi (1,834.27 km) |
| Sona to Odivelas | 1,119.82 mi (1,802.18 km) |
| Sona to Oeiras | 1,129.95 mi (1,818.48 km) |
| Sona to Olhao | 1,126.87 mi (1,813.52 km) |
| Sona to Oliveira de Azemeis | 1,020.97 mi (1,643.09 km) |
| Sona to Oliveira de Frades | 1,010.70 mi (1,626.56 km) |
