| Houston to Carmona | 4,990.91 mi (8,032.10 km) |
| Houston to Cartagena | 5,217.02 mi (8,395.98 km) |
| Houston to Cartama | 5,062.91 mi (8,147.97 km) |
| Houston to Cartaya | 4,919.96 mi (7,917.90 km) |
| Houston to Caspe | 5,150.42 mi (8,288.81 km) |
| Houston to Cassa de la Selva | 5,263.68 mi (8,471.08 km) |
| Houston to Castalla | 5,201.29 mi (8,370.66 km) |
| Houston to Castellbisbal | 5,236.10 mi (8,426.69 km) |
| Houston to Castelldefels | 5,242.10 mi (8,436.35 km) |
| Houston to Castello de Ampurias | 5,260.88 mi (8,466.56 km) |
| Houston to Castellon de la Plana | 5,188.91 mi (8,350.74 km) |
| Houston to Castilleja de la Cuesta | 4,972.42 mi (8,002.34 km) |
| Houston to Catarroja | 5,189.18 mi (8,351.18 km) |
| Houston to Catral | 5,208.32 mi (8,381.97 km) |
| Houston to Caudete | 5,182.64 mi (8,340.66 km) |
