| Rock Island to Cadiz | 4,352.02 mi (7,003.90 km) |
| Rock Island to Calafell | 4,524.13 mi (7,280.88 km) |
| Rock Island to Calahorra | 4,330.27 mi (6,968.89 km) |
| Rock Island to Calasparra | 4,496.90 mi (7,237.06 km) |
| Rock Island to Calatayud | 4,380.25 mi (7,049.34 km) |
| Rock Island to Caldas de Montbuy | 4,532.62 mi (7,294.55 km) |
| Rock Island to Caldas de Reyes | 4,027.74 mi (6,482.02 km) |
| Rock Island to Calella | 4,554.30 mi (7,329.44 km) |
| Rock Island to Callosa de Segura | 4,537.85 mi (7,302.97 km) |
| Rock Island to Calpe | 4,558.35 mi (7,335.96 km) |
| Rock Island to Calvia | 4,629.42 mi (7,450.33 km) |
| Rock Island to Camas | 4,331.58 mi (6,971.00 km) |
| Rock Island to Cambados | 4,024.04 mi (6,476.06 km) |
| Rock Island to Cambre | 4,018.30 mi (6,466.83 km) |
| Rock Island to Cambrils | 4,507.36 mi (7,253.89 km) |
