| Rock Island to Carmona | 4,347.55 mi (6,996.70 km) |
| Rock Island to Cartagena | 4,553.86 mi (7,328.72 km) |
| Rock Island to Cartama | 4,422.41 mi (7,117.18 km) |
| Rock Island to Cartaya | 4,284.40 mi (6,895.08 km) |
| Rock Island to Caspe | 4,453.99 mi (7,168.00 km) |
| Rock Island to Cassa de la Selva | 4,552.38 mi (7,326.35 km) |
| Rock Island to Castalla | 4,528.54 mi (7,287.98 km) |
| Rock Island to Castellbisbal | 4,530.89 mi (7,291.76 km) |
| Rock Island to Castelldefels | 4,538.40 mi (7,303.85 km) |
| Rock Island to Castello de Ampurias | 4,546.21 mi (7,316.42 km) |
| Rock Island to Castellon de la Plana | 4,502.43 mi (7,245.96 km) |
| Rock Island to Castilleja de la Cuesta | 4,331.50 mi (6,970.88 km) |
| Rock Island to Catarroja | 4,508.78 mi (7,256.18 km) |
| Rock Island to Catral | 4,539.74 mi (7,306.00 km) |
| Rock Island to Caudete | 4,510.21 mi (7,258.49 km) |
