| Sierning to Montemor-o-Novo | 1,297.72 mi (2,088.47 km) |
| Sierning to Montemor-o-Velho | 1,257.49 mi (2,023.74 km) |
| Sierning to Montijo | 1,325.77 mi (2,133.62 km) |
| Sierning to Mortagua | 1,227.57 mi (1,975.58 km) |
| Sierning to Moura | 1,287.17 mi (2,071.50 km) |
| Sierning to Murtosa | 1,234.21 mi (1,986.27 km) |
| Sierning to Nazare | 1,296.19 mi (2,086.01 km) |
| Sierning to Nelas | 1,207.52 mi (1,943.32 km) |
| Sierning to Obidos | 1,309.69 mi (2,107.75 km) |
| Sierning to Odemira | 1,361.20 mi (2,190.64 km) |
| Sierning to Odivelas | 1,333.49 mi (2,146.05 km) |
| Sierning to Oeiras | 1,343.82 mi (2,162.67 km) |
| Sierning to Olhao | 1,352.89 mi (2,177.27 km) |
| Sierning to Oliveira de Azemeis | 1,223.29 mi (1,968.70 km) |
| Sierning to Oliveira de Frades | 1,214.83 mi (1,955.09 km) |
