| Howard to Carmona | 4,140.59 mi (6,663.64 km) |
| Howard to Cartagena | 4,341.10 mi (6,986.33 km) |
| Howard to Cartama | 4,215.91 mi (6,784.86 km) |
| Howard to Cartaya | 4,079.74 mi (6,565.70 km) |
| Howard to Caspe | 4,233.24 mi (6,812.75 km) |
| Howard to Cassa de la Selva | 4,327.80 mi (6,964.92 km) |
| Howard to Castalla | 4,313.46 mi (6,941.84 km) |
| Howard to Castellbisbal | 4,307.81 mi (6,932.76 km) |
| Howard to Castelldefels | 4,315.67 mi (6,945.40 km) |
| Howard to Castello de Ampurias | 4,320.84 mi (6,953.71 km) |
| Howard to Castellon de la Plana | 4,284.01 mi (6,894.45 km) |
| Howard to Castilleja de la Cuesta | 4,125.25 mi (6,638.94 km) |
| Howard to Catarroja | 4,291.85 mi (6,907.06 km) |
| Howard to Catral | 4,325.67 mi (6,961.49 km) |
| Howard to Caudete | 4,295.27 mi (6,912.57 km) |
