| Euclid to Carmona | 3,919.83 mi (6,308.35 km) |
| Euclid to Cartagena | 4,134.44 mi (6,653.74 km) |
| Euclid to Cartama | 3,993.85 mi (6,427.47 km) |
| Euclid to Cartaya | 3,853.70 mi (6,201.93 km) |
| Euclid to Caspe | 4,049.82 mi (6,517.55 km) |
| Euclid to Cassa de la Selva | 4,156.50 mi (6,689.24 km) |
| Euclid to Castalla | 4,113.19 mi (6,619.53 km) |
| Euclid to Castellbisbal | 4,131.56 mi (6,649.10 km) |
| Euclid to Castelldefels | 4,138.26 mi (6,659.89 km) |
| Euclid to Castello de Ampurias | 4,152.26 mi (6,682.41 km) |
| Euclid to Castellon de la Plana | 4,093.38 mi (6,587.66 km) |
| Euclid to Castilleja de la Cuesta | 3,902.85 mi (6,281.02 km) |
| Euclid to Catarroja | 4,096.86 mi (6,593.25 km) |
| Euclid to Catral | 4,122.59 mi (6,634.66 km) |
| Euclid to Caudete | 4,094.68 mi (6,589.74 km) |
