| Keystone to Carmona | 4,394.22 mi (7,071.82 km) |
| Keystone to Cartagena | 4,634.42 mi (7,458.38 km) |
| Keystone to Cartama | 4,462.24 mi (7,181.28 km) |
| Keystone to Cartaya | 4,317.72 mi (6,948.70 km) |
| Keystone to Caspe | 4,604.09 mi (7,409.57 km) |
| Keystone to Cassa de la Selva | 4,732.40 mi (7,616.07 km) |
| Keystone to Castalla | 4,628.52 mi (7,448.89 km) |
| Keystone to Castellbisbal | 4,698.11 mi (7,560.88 km) |
| Keystone to Castelldefels | 4,702.22 mi (7,567.49 km) |
| Keystone to Castello de Ampurias | 4,733.78 mi (7,618.28 km) |
| Keystone to Castellon de la Plana | 4,630.76 mi (7,452.49 km) |
| Keystone to Castilleja de la Cuesta | 4,373.90 mi (7,039.12 km) |
| Keystone to Catarroja | 4,624.56 mi (7,442.51 km) |
| Keystone to Catral | 4,631.22 mi (7,453.23 km) |
| Keystone to Caudete | 4,609.93 mi (7,418.97 km) |
