| Signa to Alfena | 1,012.42 mi (1,629.33 km) |
| Signa to Alijo | 959.38 mi (1,543.97 km) |
| Signa to Aljustrel | 1,082.25 mi (1,741.72 km) |
| Signa to Almada | 1,106.77 mi (1,781.17 km) |
| Signa to Almargem | 1,107.46 mi (1,782.28 km) |
| Signa to Almeirim | 1,065.44 mi (1,714.66 km) |
| Signa to Amadora | 1,108.89 mi (1,784.58 km) |
| Signa to Amarante | 989.02 mi (1,591.67 km) |
| Signa to Amares | 995.70 mi (1,602.42 km) |
| Signa to Amora | 1,106.42 mi (1,780.61 km) |
| Signa to Anadia | 1,025.04 mi (1,649.65 km) |
| Signa to Angra do Heroismo | 2,004.16 mi (3,225.38 km) |
| Signa to Ansiao | 1,037.48 mi (1,669.66 km) |
| Signa to Anta | 1,022.03 mi (1,644.80 km) |
| Signa to Arcos de Valdevez | 995.90 mi (1,602.75 km) |
