| Houston to Castrovillari | 5,929.87 mi (9,543.21 km) |
| Houston to Catania | 5,974.72 mi (9,615.38 km) |
| Houston to Catanzaro | 5,984.48 mi (9,631.09 km) |
| Houston to Cattolica | 5,620.01 mi (9,044.53 km) |
| Houston to Cava de' Tirreni | 5,830.05 mi (9,382.55 km) |
| Houston to Cavallino | 5,994.20 mi (9,646.73 km) |
| Houston to Cavarzere | 5,548.92 mi (8,930.12 km) |
| Houston to Cave | 5,710.74 mi (9,190.55 km) |
| Houston to Cavriago | 5,501.15 mi (8,853.25 km) |
| Houston to Cavriglia | 5,584.71 mi (8,987.71 km) |
| Houston to Cazzago San Martino | 5,448.08 mi (8,767.84 km) |
| Houston to Ceccano | 5,737.51 mi (9,233.62 km) |
| Houston to Cecina | 5,551.17 mi (8,933.75 km) |
| Houston to Cefalu | 5,905.56 mi (9,504.07 km) |
| Houston to Ceglie Messapico | 5,950.96 mi (9,577.14 km) |
