| Big Spring to Cascais | 4,971.58 mi (8,000.98 km) |
| Big Spring to Castelo Branco | 5,026.73 mi (8,089.75 km) |
| Big Spring to Castro Daire | 4,971.78 mi (8,001.30 km) |
| Big Spring to Celorico de Basto | 4,953.38 mi (7,971.69 km) |
| Big Spring to Chamusca | 4,995.40 mi (8,039.31 km) |
| Big Spring to Chaves | 4,966.33 mi (7,992.54 km) |
| Big Spring to Cinfaes | 4,956.17 mi (7,976.19 km) |
| Big Spring to Coimbra | 4,970.53 mi (7,999.30 km) |
| Big Spring to Condeixa-a-Nova | 4,970.21 mi (7,998.77 km) |
| Big Spring to Corroios | 4,987.03 mi (8,025.85 km) |
| Big Spring to Coruche | 5,005.90 mi (8,056.23 km) |
| Big Spring to Costa de Caparica | 4,982.02 mi (8,017.78 km) |
| Big Spring to Covilha | 5,011.67 mi (8,065.50 km) |
| Big Spring to Eiras | 4,969.79 mi (7,998.11 km) |
| Big Spring to Elvas | 5,074.19 mi (8,166.12 km) |
