| Big Spring to Benavente | 4,992.58 mi (8,034.79 km) |
| Big Spring to Bombarral | 4,966.10 mi (7,992.16 km) |
| Big Spring to Bougado | 4,929.02 mi (7,932.49 km) |
| Big Spring to Braga | 4,928.76 mi (7,932.08 km) |
| Big Spring to Braganca | 4,996.76 mi (8,041.50 km) |
| Big Spring to Cabeceiras de Basto | 4,947.87 mi (7,962.83 km) |
| Big Spring to Cacem | 4,974.55 mi (8,005.77 km) |
| Big Spring to Cadaval | 4,969.83 mi (7,998.17 km) |
| Big Spring to Caldas da Rainha | 4,962.63 mi (7,986.58 km) |
| Big Spring to Calheta | 4,765.21 mi (7,668.87 km) |
| Big Spring to Camara de Lobos | 4,775.96 mi (7,686.17 km) |
| Big Spring to Canico | 4,784.28 mi (7,699.55 km) |
| Big Spring to Cantanhede | 4,958.53 mi (7,979.98 km) |
| Big Spring to Carregal do Sal | 4,983.54 mi (8,020.23 km) |
| Big Spring to Cartaxo | 4,987.54 mi (8,026.67 km) |
