| Siniscola to Montemor-o-Novo | 960.99 mi (1,546.56 km) |
| Siniscola to Montemor-o-Velho | 966.16 mi (1,554.89 km) |
| Siniscola to Montijo | 996.29 mi (1,603.38 km) |
| Siniscola to Mortagua | 940.37 mi (1,513.38 km) |
| Siniscola to Moura | 929.89 mi (1,496.52 km) |
| Siniscola to Murtosa | 959.12 mi (1,543.56 km) |
| Siniscola to Nazare | 992.23 mi (1,596.84 km) |
| Siniscola to Nelas | 919.72 mi (1,480.14 km) |
| Siniscola to Obidos | 1,000.02 mi (1,609.38 km) |
| Siniscola to Odemira | 1,002.64 mi (1,613.60 km) |
| Siniscola to Odivelas | 1,009.28 mi (1,624.28 km) |
| Siniscola to Oeiras | 1,018.16 mi (1,638.57 km) |
| Siniscola to Olhao | 973.80 mi (1,567.17 km) |
| Siniscola to Oliveira de Azemeis | 950.22 mi (1,529.22 km) |
| Siniscola to Oliveira de Frades | 935.76 mi (1,505.97 km) |
