| Siano to Alfena | 1,207.19 mi (1,942.79 km) |
| Siano to Alijo | 1,152.66 mi (1,855.03 km) |
| Siano to Aljustrel | 1,233.82 mi (1,985.64 km) |
| Siano to Almada | 1,271.74 mi (2,046.67 km) |
| Siano to Almargem | 1,274.87 mi (2,051.70 km) |
| Siano to Almeirim | 1,235.10 mi (1,987.70 km) |
| Siano to Amadora | 1,274.77 mi (2,051.54 km) |
| Siano to Amarante | 1,183.30 mi (1,904.33 km) |
| Siano to Amares | 1,194.73 mi (1,922.73 km) |
| Siano to Amora | 1,270.60 mi (2,044.83 km) |
| Siano to Anadia | 1,209.71 mi (1,946.84 km) |
| Siano to Angra do Heroismo | 2,210.69 mi (3,557.76 km) |
| Siano to Ansiao | 1,215.65 mi (1,956.40 km) |
| Siano to Anta | 1,214.20 mi (1,954.06 km) |
| Siano to Arcos de Valdevez | 1,197.82 mi (1,927.71 km) |
