| Sierning to Bombarral | 1,313.16 mi (2,113.32 km) |
| Sierning to Bougado | 1,209.39 mi (1,946.32 km) |
| Sierning to Braga | 1,195.78 mi (1,924.43 km) |
| Sierning to Braganca | 1,112.61 mi (1,790.57 km) |
| Sierning to Cabeceiras de Basto | 1,178.28 mi (1,896.26 km) |
| Sierning to Cacem | 1,339.88 mi (2,156.33 km) |
| Sierning to Cadaval | 1,312.13 mi (2,111.66 km) |
| Sierning to Caldas da Rainha | 1,306.79 mi (2,103.07 km) |
| Sierning to Calheta | 1,944.98 mi (3,130.15 km) |
| Sierning to Camara de Lobos | 1,938.34 mi (3,119.45 km) |
| Sierning to Canico | 1,935.38 mi (3,114.70 km) |
| Sierning to Cantanhede | 1,246.78 mi (2,006.51 km) |
| Sierning to Carregal do Sal | 1,217.27 mi (1,959.01 km) |
| Sierning to Cartaxo | 1,301.66 mi (2,094.82 km) |
| Sierning to Cascais | 1,347.48 mi (2,168.56 km) |
