| Houston to Cadiz | 4,983.98 mi (8,020.93 km) |
| Houston to Calafell | 5,225.82 mi (8,410.15 km) |
| Houston to Calahorra | 5,028.73 mi (8,092.95 km) |
| Houston to Calasparra | 5,162.59 mi (8,308.38 km) |
| Houston to Calatayud | 5,072.15 mi (8,162.83 km) |
| Houston to Caldas de Montbuy | 5,239.64 mi (8,432.38 km) |
| Houston to Caldas de Reyes | 4,707.43 mi (7,575.87 km) |
| Houston to Calella | 5,262.88 mi (8,469.79 km) |
| Houston to Callosa de Segura | 5,205.83 mi (8,377.97 km) |
| Houston to Calpe | 5,234.25 mi (8,423.71 km) |
| Houston to Calvia | 5,321.90 mi (8,564.77 km) |
| Houston to Camas | 4,972.74 mi (8,002.85 km) |
| Houston to Cambados | 4,702.28 mi (7,567.59 km) |
| Houston to Cambre | 4,705.05 mi (7,572.04 km) |
| Houston to Cambrils | 5,206.25 mi (8,378.66 km) |
