| Seaham to Benavente | 1,150.32 mi (1,851.26 km) |
| Seaham to Bombarral | 1,135.38 mi (1,827.22 km) |
| Seaham to Bougado | 989.40 mi (1,592.29 km) |
| Seaham to Braga | 973.21 mi (1,566.22 km) |
| Seaham to Braganca | 933.59 mi (1,502.47 km) |
| Seaham to Cabeceiras de Basto | 968.41 mi (1,558.50 km) |
| Seaham to Cacem | 1,170.70 mi (1,884.06 km) |
| Seaham to Cadaval | 1,136.88 mi (1,829.63 km) |
| Seaham to Caldas da Rainha | 1,125.86 mi (1,811.89 km) |
| Seaham to Calheta | 1,710.73 mi (2,753.15 km) |
| Seaham to Camara de Lobos | 1,708.61 mi (2,749.75 km) |
| Seaham to Canico | 1,709.34 mi (2,750.92 km) |
| Seaham to Cantanhede | 1,055.56 mi (1,698.76 km) |
| Seaham to Carregal do Sal | 1,041.43 mi (1,676.02 km) |
| Seaham to Cartaxo | 1,137.86 mi (1,831.21 km) |
