| Houston to Chivasso | 5,372.81 mi (8,646.71 km) |
| Houston to Ciampino | 5,697.10 mi (9,168.60 km) |
| Houston to Cicciano | 5,812.35 mi (9,354.07 km) |
| Houston to Cingoli | 5,663.09 mi (9,113.86 km) |
| Houston to Cinisello Balsamo | 5,415.75 mi (8,715.81 km) |
| Houston to Cinisi | 5,859.27 mi (9,429.58 km) |
| Houston to Cirie | 5,359.20 mi (8,624.80 km) |
| Houston to Ciro Marina | 5,987.98 mi (9,636.73 km) |
| Houston to Cislago | 5,401.83 mi (8,693.41 km) |
| Houston to Cisterna di Latina | 5,714.92 mi (9,197.28 km) |
| Houston to Cisternino | 5,944.72 mi (9,567.10 km) |
| Houston to Citta di Castello | 5,618.80 mi (9,042.58 km) |
| Houston to Citta Sant'Angelo | 5,730.93 mi (9,223.05 km) |
| Houston to Cittadella | 5,517.57 mi (8,879.67 km) |
| Houston to Cittanova | 5,984.36 mi (9,630.90 km) |
