| Rockford to Cascais | 4,033.73 mi (6,491.67 km) |
| Rockford to Castelo Branco | 4,081.22 mi (6,568.09 km) |
| Rockford to Castro Daire | 4,023.08 mi (6,474.53 km) |
| Rockford to Celorico de Basto | 4,003.13 mi (6,442.42 km) |
| Rockford to Chamusca | 4,053.27 mi (6,523.10 km) |
| Rockford to Chaves | 4,014.22 mi (6,460.26 km) |
| Rockford to Cinfaes | 4,007.08 mi (6,448.77 km) |
| Rockford to Coimbra | 4,025.05 mi (6,477.68 km) |
| Rockford to Condeixa-a-Nova | 4,025.18 mi (6,477.90 km) |
| Rockford to Corroios | 4,049.05 mi (6,516.32 km) |
| Rockford to Coruche | 4,065.40 mi (6,542.64 km) |
| Rockford to Costa de Caparica | 4,044.07 mi (6,508.30 km) |
| Rockford to Covilha | 4,064.48 mi (6,541.15 km) |
| Rockford to Eiras | 4,024.18 mi (6,476.30 km) |
| Rockford to Elvas | 4,131.64 mi (6,649.23 km) |
