| Alton to Benavente | 923.06 mi (1,485.52 km) |
| Alton to Bombarral | 911.04 mi (1,466.18 km) |
| Alton to Bougado | 767.77 mi (1,235.61 km) |
| Alton to Braga | 751.37 mi (1,209.22 km) |
| Alton to Braganca | 701.18 mi (1,128.44 km) |
| Alton to Cabeceiras de Basto | 743.65 mi (1,196.79 km) |
| Alton to Cacem | 945.92 mi (1,522.32 km) |
| Alton to Cadaval | 912.11 mi (1,467.89 km) |
| Alton to Caldas da Rainha | 901.80 mi (1,451.30 km) |
| Alton to Calheta | 1,513.33 mi (2,435.47 km) |
| Alton to Camara de Lobos | 1,510.10 mi (2,430.28 km) |
| Alton to Canico | 1,509.98 mi (2,430.08 km) |
| Alton to Cantanhede | 830.85 mi (1,337.12 km) |
| Alton to Carregal do Sal | 813.18 mi (1,308.69 km) |
| Alton to Cartaxo | 910.97 mi (1,466.06 km) |
