| Houston to Cernavoda | 6,197.50 mi (9,973.91 km) |
| Houston to Chitila | 6,115.30 mi (9,841.63 km) |
| Houston to Cisnadie | 5,993.29 mi (9,645.27 km) |
| Houston to Cluj-Napoca | 5,925.28 mi (9,535.82 km) |
| Houston to Codlea | 6,040.88 mi (9,721.86 km) |
| Houston to Comanesti | 6,042.73 mi (9,724.84 km) |
| Houston to Comarnic | 6,068.33 mi (9,766.04 km) |
| Houston to Constanta | 6,227.12 mi (10,021.58 km) |
| Houston to Corabia | 6,094.27 mi (9,807.79 km) |
| Houston to Costesti | 6,067.44 mi (9,764.60 km) |
| Houston to Covasna | 6,060.39 mi (9,753.25 km) |
| Houston to Craiova | 6,043.18 mi (9,725.56 km) |
| Houston to Cristuru Secuiesc | 5,998.93 mi (9,654.34 km) |
| Houston to Cugir | 5,958.60 mi (9,589.44 km) |
| Houston to Cumpana | 6,226.94 mi (10,021.29 km) |
