| Houston to Cadillac (Michigan) | 1,138.70 mi (1,832.56 km) |
| Houston to Caguas (Puerto Rico) | 2,009.33 mi (3,233.70 km) |
| Houston to Cahokia (Illinois) | 675.40 mi (1,086.95 km) |
| Houston to Calabasas (California) | 1,394.10 mi (2,243.59 km) |
| Houston to Caldwell (Idaho) | 1,510.31 mi (2,430.61 km) |
| Houston to Caledonia (Wisconsin) | 990.61 mi (1,594.24 km) |
| Houston to Calera (Alabama) | 559.00 mi (899.63 km) |
| Houston to Calexico (California) | 1,202.69 mi (1,935.54 km) |
| Houston to Calhoun (Georgia) | 691.89 mi (1,113.49 km) |
| Houston to California (Maryland) | 1,227.78 mi (1,975.93 km) |
| Houston to California City (California) | 1,358.75 mi (2,186.69 km) |
| Houston to Callaway (Florida) | 588.84 mi (947.65 km) |
| Houston to Calumet City (Illinois) | 927.02 mi (1,491.89 km) |
| Houston to Calverton (Maryland) | 1,227.21 mi (1,975.00 km) |
| Houston to Camano (Washington) | 1,913.58 mi (3,079.62 km) |
