| Somma Lombardo to Montemor-o-Novo | 990.43 mi (1,593.94 km) |
| Somma Lombardo to Montemor-o-Velho | 955.96 mi (1,538.46 km) |
| Somma Lombardo to Montijo | 1,019.55 mi (1,640.81 km) |
| Somma Lombardo to Mortagua | 926.29 mi (1,490.72 km) |
| Somma Lombardo to Moura | 977.90 mi (1,573.78 km) |
| Somma Lombardo to Murtosa | 935.13 mi (1,504.95 km) |
| Somma Lombardo to Nazare | 993.15 mi (1,598.32 km) |
| Somma Lombardo to Nelas | 905.85 mi (1,457.83 km) |
| Somma Lombardo to Obidos | 1,005.96 mi (1,618.94 km) |
| Somma Lombardo to Odemira | 1,052.25 mi (1,693.43 km) |
| Somma Lombardo to Odivelas | 1,028.00 mi (1,654.41 km) |
| Somma Lombardo to Oeiras | 1,038.24 mi (1,670.88 km) |
| Somma Lombardo to Olhao | 1,042.52 mi (1,677.78 km) |
| Somma Lombardo to Oliveira de Azemeis | 924.40 mi (1,487.68 km) |
| Somma Lombardo to Oliveira de Frades | 914.74 mi (1,472.14 km) |
