| Sierre to Montalegre | 819.65 mi (1,319.11 km) |
| Sierre to Montemor-o-Novo | 958.33 mi (1,542.28 km) |
| Sierre to Montemor-o-Velho | 917.37 mi (1,476.36 km) |
| Sierre to Montijo | 985.95 mi (1,586.73 km) |
| Sierre to Mortagua | 887.46 mi (1,428.24 km) |
| Sierre to Moura | 949.35 mi (1,527.83 km) |
| Sierre to Murtosa | 894.48 mi (1,439.52 km) |
| Sierre to Nazare | 955.97 mi (1,538.49 km) |
| Sierre to Nelas | 867.37 mi (1,395.90 km) |
| Sierre to Obidos | 969.49 mi (1,560.24 km) |
| Sierre to Odemira | 1,022.95 mi (1,646.28 km) |
| Sierre to Odivelas | 993.48 mi (1,598.86 km) |
| Sierre to Oeiras | 1,003.83 mi (1,615.50 km) |
| Sierre to Olhao | 1,016.88 mi (1,636.50 km) |
| Sierre to Oliveira de Azemeis | 883.59 mi (1,422.00 km) |
