| Keystone to Benavente | 4,201.13 mi (6,761.07 km) |
| Keystone to Bombarral | 4,177.65 mi (6,723.28 km) |
| Keystone to Bougado | 4,175.38 mi (6,719.62 km) |
| Keystone to Braga | 4,179.12 mi (6,725.64 km) |
| Keystone to Braganca | 4,258.50 mi (6,853.39 km) |
| Keystone to Cabeceiras de Basto | 4,199.71 mi (6,758.78 km) |
| Keystone to Cacem | 4,177.88 mi (6,723.65 km) |
| Keystone to Cadaval | 4,181.10 mi (6,728.82 km) |
| Keystone to Caldas da Rainha | 4,176.39 mi (6,721.26 km) |
| Keystone to Calheta | 3,849.44 mi (6,195.07 km) |
| Keystone to Camara de Lobos | 3,860.53 mi (6,212.93 km) |
| Keystone to Canico | 3,868.65 mi (6,225.98 km) |
| Keystone to Cantanhede | 4,189.16 mi (6,741.80 km) |
| Keystone to Carregal do Sal | 4,218.14 mi (6,788.45 km) |
| Keystone to Cartaxo | 4,198.94 mi (6,757.54 km) |
