| Cahokia to Cascais | 4,201.45 mi (6,761.57 km) |
| Cahokia to Castelo Branco | 4,255.75 mi (6,848.97 km) |
| Cahokia to Castro Daire | 4,200.67 mi (6,760.32 km) |
| Cahokia to Celorico de Basto | 4,182.27 mi (6,730.71 km) |
| Cahokia to Chamusca | 4,224.70 mi (6,799.00 km) |
| Cahokia to Chaves | 4,195.30 mi (6,751.68 km) |
| Cahokia to Cinfaes | 4,185.06 mi (6,735.20 km) |
| Cahokia to Coimbra | 4,199.54 mi (6,758.51 km) |
| Cahokia to Condeixa-a-Nova | 4,199.25 mi (6,758.04 km) |
| Cahokia to Corroios | 4,216.88 mi (6,786.41 km) |
| Cahokia to Coruche | 4,235.41 mi (6,816.23 km) |
| Cahokia to Costa de Caparica | 4,211.87 mi (6,778.35 km) |
| Cahokia to Covilha | 4,240.59 mi (6,824.58 km) |
| Cahokia to Eiras | 4,198.80 mi (6,757.31 km) |
| Cahokia to Elvas | 4,303.47 mi (6,925.76 km) |
