| Somain to Montemor-o-Novo | 985.10 mi (1,585.36 km) |
| Somain to Montemor-o-Velho | 911.07 mi (1,466.22 km) |
| Somain to Montijo | 1,002.56 mi (1,613.47 km) |
| Somain to Mortagua | 882.33 mi (1,419.97 km) |
| Somain to Moura | 995.44 mi (1,602.01 km) |
| Somain to Murtosa | 877.89 mi (1,412.83 km) |
| Somain to Nazare | 954.79 mi (1,536.58 km) |
| Somain to Nelas | 866.08 mi (1,393.83 km) |
| Somain to Obidos | 971.30 mi (1,563.16 km) |
| Somain to Odemira | 1,060.11 mi (1,706.08 km) |
| Somain to Odivelas | 1,004.54 mi (1,616.65 km) |
| Somain to Oeiras | 1,014.77 mi (1,633.11 km) |
| Somain to Olhao | 1,073.07 mi (1,726.93 km) |
| Somain to Oliveira de Azemeis | 867.03 mi (1,395.34 km) |
| Somain to Oliveira de Frades | 864.86 mi (1,391.86 km) |
