| Keystone to Cehegin | 4,581.39 mi (7,373.03 km) |
| Keystone to Cervello | 4,698.76 mi (7,561.92 km) |
| Keystone to Cervera | 4,659.10 mi (7,498.10 km) |
| Keystone to Ceuti | 4,608.89 mi (7,417.29 km) |
| Keystone to Cheste | 4,608.71 mi (7,417.00 km) |
| Keystone to Chiclana de la Frontera | 4,387.53 mi (7,061.05 km) |
| Keystone to Chipiona | 4,366.24 mi (7,026.79 km) |
| Keystone to Chiva | 4,607.10 mi (7,414.41 km) |
| Keystone to Churriana de la Vega | 4,504.85 mi (7,249.86 km) |
| Keystone to Ciempozuelos | 4,446.10 mi (7,155.31 km) |
| Keystone to Cieza | 4,597.85 mi (7,399.52 km) |
| Keystone to Cisterniga | 4,365.48 mi (7,025.56 km) |
| Keystone to Ciudad de Melilla | 4,582.20 mi (7,374.34 km) |
| Keystone to Ciudad Real | 4,453.80 mi (7,167.69 km) |
| Keystone to Ciudad-Rodrigo | 4,289.84 mi (6,903.83 km) |
