| Somain to Alfena | 846.75 mi (1,362.71 km) |
| Somain to Alijo | 811.91 mi (1,306.64 km) |
| Somain to Aljustrel | 1,027.47 mi (1,653.55 km) |
| Somain to Almada | 1,010.27 mi (1,625.88 km) |
| Somain to Almargem | 1,003.95 mi (1,615.71 km) |
| Somain to Almeirim | 964.30 mi (1,551.90 km) |
| Somain to Amadora | 1,009.41 mi (1,624.49 km) |
| Somain to Amarante | 830.68 mi (1,336.84 km) |
| Somain to Amares | 820.05 mi (1,319.75 km) |
| Somain to Amora | 1,012.24 mi (1,629.04 km) |
| Somain to Anadia | 888.42 mi (1,429.78 km) |
| Somain to Angra do Heroismo | 1,689.58 mi (2,719.11 km) |
| Somain to Ansiao | 917.68 mi (1,476.86 km) |
| Somain to Anta | 862.54 mi (1,388.12 km) |
| Somain to Arcos de Valdevez | 810.46 mi (1,304.31 km) |
